CN100341294C - Media gateway and its method for distributing service flow IP address - Google Patents
Media gateway and its method for distributing service flow IP address Download PDFInfo
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- CN100341294C CN100341294C CNB2004100805327A CN200410080532A CN100341294C CN 100341294 C CN100341294 C CN 100341294C CN B2004100805327 A CNB2004100805327 A CN B2004100805327A CN 200410080532 A CN200410080532 A CN 200410080532A CN 100341294 C CN100341294 C CN 100341294C
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Abstract
The present invention discloses a media gateway. An address selection module is added to the media gateway based on an original media gateway, and the media gateway is used for dynamically selecting one IP address from a plurality of IP addresses as the IP address of current service flow. The present invention also discloses a method for allocating IP addresses of service flow, and the method configures different interface IP addresses for each interface of at least two interfaces of the media gateway. When the media gateway receives a service request and needs to allocate an IP address for the service flow of the service request, the media gateway dynamically selects one IP address from at least two IP addresses as the IP address of the service flow of the service request. After the media gateway and the method of the present invention is used, the media gateway can allocate IP addresses for service flow according to different situations, not only the load sharing of the service flow and many functions based on the load sharing can be realized, but also the media gateway has very large flexibility when the media gateway selects an interface to bear media flow.
Description
Technical field
The present invention relates to the media gateway technology, particularly relate to the method for a kind of media gateway and distribution service flow IP address thereof.
Background technology
Because IP technology rapid development, conventional telecommunication network will progressively become the marginal portion of grouping backbone network.Meanwhile, use in order to support that new multimedia is commercial, conventional telecommunication network will be more and more open, and introduce many new functions and physical unit, next generation network (NGN) is exactly the network configuration that reflects this new network environment, also is the hot spot technology that is discussing present normal structure, operator and instrument factory commercial city.
Referring to Fig. 1, usually, NGN comprises the aspect of four openings: operation layer, key-course, transport layer and Access Layer.Operation layer mainly is responsible for the relevant treatment of service logic, as business generation, service logic definition and business programming interface etc.; Key-course relates generally to the correlation function of soft switch, finishes the concrete execution of service logic, comprises operations such as calling intelligent and route; Transport layer is responsible for information is transmitted in packet network; Access Layer is made up of various media gateway or intelligent access terminal equipment, and its function is that the user is connected to network, concentrates customer service then and it is passed to the destination, and Tandem Gateway shown in Figure 1 and IAD all belong to media gateway.
In NGN, media gateway in the Access Layer is an important component part, it is used for a kind of media conversion of network is become the needed media formats of another kind of network, for example, media gateway can be changed information such as processing audio and video between the Media Stream of the bearer path of Circuit Switching Network and Packet Based Network.Media gateway can be divided into Tandem Gateway, IAD, IP-IP gateway etc., is the key equipment of NGN service access to packet carrying network.
NGN needs very high reliabilty and availability as the Next Generation Telecommunication Networks network.Thereby operator requires media gateway to be connected in dual-homed mode on the edge router of transport layer usually, and promptly media gateway is connected on two edge routers by two interface L0 and L1 respectively.
Media gateway has two kinds of Business Streams to need to handle, and a kind of is signaling flow, is in order to carry out the Signalling exchange flow of calling and called communication between media gateway and the call server.Another is a Media Stream, is the real service traffics between the calling subscriber.
Introduce the definition of several IP address below:
Interface IP address: the IP address that on media gateway interface L0 and L1, disposes.
The medium flow IP address: in a media gateway, for the Business Stream that has only sending direction, the medium flow IP address is meant the source IP address that sends Media Stream, promptly sends to source IP address in the medium IP bag that transmits the net from media gateway; For the Business Stream that has only receive direction, the medium flow IP address is meant the purpose IP address of receiving media stream, i.e. the purpose IP address of media gateway from the medium IP bag that the transmission net receives; For two-way Business Stream, media gateway uses the Media Stream source IP address to send Business Stream, and the opposite end entity uses the purpose IP address of this IP address as its transmission Media Stream, so, in a media gateway, sending the Media Stream source IP address is identical with receiving media stream purpose IP address.Therefore, the medium flow IP address is meant and sends Media Stream source IP address or receiving media stream purpose IP address, and the medium flow IP address is determined by media gateway oneself.
Loopback (Loopback) address: similar with the Loopback address of router, at this, the Loopback address can be the IP address of an interface in the media gateway, also can be and a complete incoherent new IP address, interface IP address.
The signaling flow IP address: with the medium flow IP address similar definition is arranged, difference only is that one is at signaling flow, and one is at Media Stream.
In the present media gateway design, two kinds of methods are arranged: interface IP address is used in an a kind of interface IP address, two medium access control (MAC, Media Access Control) address of being to use, medium flow IP address; Another is for each interface disposes an interface IP address and MAC Address respectively, but the medium flow IP address still only uses an IP address.Hereinafter, be example with the first method, introduce the method for allocation medium flow IP address.
Referring to Fig. 2, media gateway has two main modular: one is signaling processing module, work such as the application of mainly managing business, Media Stream parameter negotiation; Another is a medium process module, and the format conversion of main process user medium generates Media Stream and is sent to IP/ multiprotocol label switching (mpls) network, or flows from IP/MPLS network receiving media.In general, signaling processing module is determined the IP address of Media Stream, and this medium flow IP address is sent to medium process module.
As shown in Figure 2, on two interface L0 and L1, all dispose same interface IP address, as IP1, still, L0 is two different interfaces with L1, has different MAC Address.
Media gateway uses interface IP address as the medium flow IP address, and promptly IP1 is as the medium flow IP address.So all Media Streams in this media gateway all use an identical IP address as the medium flow IP address.
Illustrate the scheme of prior art below, referring to Fig. 3, Fig. 3 is a simple NGN network diagram.Two media gateway: MG1 and MG2 are arranged in this network, and they are respectively by a call service management, and these two media gateway connect the user by line attachment respectively, and user S1 is connected to MG1, and user S2 is connected to MG2.Dual-homed edge router ER1 and the ER2 of being connected to of MG1, interface is respectively L0 and L1; Dual-homed edge router ER3 and the ER4 of being connected to of MG2, interface is respectively L0 and L1.
Because two interfaces of media gateway all are configured to an IP address, therefore, as shown in Figure 3, the L0 interface of MG1 and the IP address of L1 interface are IP1; The L0 interface of MG2 and the IP address of L1 interface are IP3.
As shown in Figure 4, be example with signaling H.248, between media gateway and call server, suppose S2 by user S1 calling party, realize that the process of calling out is divided into following steps:
After step 401:MG1 detected the off-hook event of S1, the notification message that sends the analog line interface message that comprises S1 was to call server.
Step 402: after call server receives notification message, send and acknowledge message to MG1, prepare to receive called subscriber's number with notice MG1.
Step 403:MG1 is transmitted to call server with this number after collecting the number of the S2 that S1 dials.
Step 404: behind the number that the call server analysis receives, authenticate,, then forward step 405 to if authentication is passed through; Otherwise, refuse this professional application, finish then.
Step 405: call server sends a notification message to MG1, and notice MG1 creates context (Context).
The signalling module option interface IP address ip 1 of step 406:MG1 is as the medium flow IP address, and transmission comprises the call server that acknowledges message to of information such as MG1 medium flow IP address, Context sign, port numbers.
Step 407: after call server receives response message, send the interpolation message that comprises information such as MG1 medium flow IP address, Context sign, port numbers and be sent to media gateway MG2, and notice MG2 creates Context.
The signalling module option interface IP address ip 3 of step 408:MG2 is as the medium flow IP address, and transmission comprises the call server that acknowledges message to of information such as MG2 medium flow IP address, Context sign, port numbers.
Step 409: after call server receives response message, send the change message comprise information such as the medium flow IP address Context sign of MG2, port numbers to MG1.
Step 410:MG1 sends an acknowledgement message to call server.Call server is forwarded to MG2 with acknowledge message.
Step 411: calling party S1 hears ring-back tone, and callee S2 begins ring simultaneously.
Step 411: behind the callee S2 off-hook, both sides can enter talking state because media gateway has obtained the medium flow IP address of opposite end respectively, so Media Stream can be between two media gateway intercommunication.
In above example, the source and destination address that the Media Stream of MG1 uses is respectively IP1 and IP3, and the source and destination address that the Media Stream of MG2 uses is respectively IP3 and IP1.At this moment, decide according to the activestandby state of media gateway in the interface path that Media Stream is flowed through, and always goes out from main line, goes into carrying media stream not on the extension wire from main line.
Design for this media gateway, two physical interfaces use same IP address and different MAC Address, like this, just make network configuration and use more complicated, because, a kind of configuration requirement of this design is connected two interface configuration on the edge router in a VLAN (Vlan), and requires two interfaces of media gateway to be operated in active/standby mode.
In addition, the ability of medium flow IP address is not selected in this design, to each Media Stream, all fix and use an IP address, like this, make that all Media Streams in the media gateway all have identical medium flow IP address as the medium flow IP address, promptly all Media Streams all send and receive from same interface, this will be unfavorable for reasonable resources distribution and load balancing, can not realize other function based on load balancing, as qos feature.
The design of another kind of media gateway is to be an interface IP of each interface configuration address, but the medium flow IP address still only uses an IP address.Referring to Fig. 5, in media gateway, interface L0 has disposed an interface IP address ip 1, and interface L1 has disposed another interface IP address ip 2.In addition, media gateway has also disposed a Loopback address, and this address is a new IP address normally, also can select one as the Loopback address among IP1 and IP2.
In the design, though media gateway is not to select an interface IP address as the medium flow IP address, but selected another IP address, as the Loopback address.But the medium flow IP address of selecting for use remains a fixing IP address, so all Media Streams still use an identical IP address as the medium flow IP address in this media gateway.
Realize in this example that the process and the previous example of calling out are similar, the source and destination address that the Media Stream of MG1 uses is respectively IP ' and IP ", the source and destination address that the Media Stream of MG2 uses is respectively IP " and IP '.Here, IP ' can be a new IP address, also can be IP1 or IP2; IP " can be a new IP address, also can be IP3 or IP4.The interface path of the media gateway that Media Stream flows out can be selected by media gateway, but the path that flows into is that media gateway be can not determine the path of inflow by the Route Selection decision of IP/MPLS net.
Though the design of this media gateway is interface IP address of a physical interface configuration, the medium flow IP address of media gateway still uses a fixing IP address.So, the medium flow IP address is no change still, and, though the design can specify the interface that sends Media Stream, can't specify the interface of receiving media stream, therefore, though the design can realize load balancing to a certain extent, but can not realize accurate and controllable load balancing, so, also be unfavorable for realizing other function based on load balancing.
Summary of the invention
Main purpose of the present invention is to provide a kind of media gateway, can select professional flow IP address for each Business Stream.
Another main purpose of the present invention is to provide a kind of method of distribution service flow IP address, to realize the load balancing of controllable Business Stream.
The objective of the invention is to be achieved through the following technical solutions:
A kind of media gateway, this media gateway comprises signaling processing module and medium process module, and at least two edge routers with the transmission net are connected, and interface with distinct interface IP address, signaling processing module determines that also the transport service flow IP address is to medium process module, wherein, this media gateway further comprises address selection module, this address selection module receives the Business Stream IP application IP addresses message that signaling processing module is sent, IP address of Dynamic Selection from least two IP addresses as current business flow, and pass professional flow IP address back signaling processing module.
Wherein, described Business Stream is a Media Stream.
Preferably, described at least two IP addresses are at least two different interface IP addresses.
Wherein, described media gateway is Tandem Gateway, IAD or IP-IP gateway.
A kind of method of media gateway distribution service flow IP address, this media gateway have at least two interfaces that are connected with the transmission net, and this method comprises the steps:
A, media gateway are that described each described interface that connects with the transmission net is provided with different interface IP addresses;
B, media gateway are receiving a professional application and need be for the traffic flow assignment IP address of this business application the time, professional flow IP address as this business application of Dynamic Selection from least two different interface IP addresses.
Wherein, described Business Stream is a Media Stream.
Wherein, step B described from least two different interface IP addresses the method for an IP address of Dynamic Selection be: determine the interface of carrying current business flow according to interface load balancing ratio, select the IP address of determined interface.
Wherein, described interface load balancing ratio is preestablished by media gateway, or is dynamically set according to the quality of service of current at least two interfaces by media gateway.
Wherein, step B described from least two different interface IP addresses the method for an IP address of Dynamic Selection be: search for available interface successively according to the priority preset order, the present available the highest interface of priority is defined as carrying the interface of current business flow, selects the IP address of determined interface;
Perhaps, determine present network state, determine to carry the interface of current business flow, select the IP address of determined interface according to present network state;
Perhaps, from the mapping table of predefined time period and interface, search the pairing interface of current slot, pairing interface is defined as carrying the interface of current business flow, select the IP address of determined interface;
Perhaps, from the mapping table of predefined incident and interface, search the pairing interface of current event, pairing interface is defined as carrying the interface of current business flow, select the IP address of determined interface.
Wherein, described media gateway is Tandem Gateway, IAD or IP-IP gateway.
The invention provides a kind of media gateway, this media gateway also comprises address selection module except comprising signaling processing module, medium process module and at least two interfaces, can be from least two IP addresses one of Dynamic Selection as the current business flow IP address.The media gateway of prior art does not have the Dynamic Selection function of professional flow IP address.
The present invention also provides a kind of method of media gateway distribution service flow IP address, and this method is that each interface at least two interfaces in the media gateway is provided with different interface IP addresses; When media gateway receives a professional application and need be for the traffic flow assignment IP address of this business application the time, professional flow IP address of Dynamic Selection from least two different interface IP addresses as this business application.Comparatively speaking, the method for prior art can only be fixed and be selected an IP address as all professional flow IP address, can't guarantee to realize load balancing on a plurality of interfaces, also can't realize a lot of other functions based on load balancing.
By more as can be seen, the present invention makes media gateway select a professional flow IP address of conduct neatly from a plurality of interface IP address, has overcome the defective that can not select professional flow IP address in the method for prior art flexibly.And it is consistent with the interface that receives Business Stream that the present invention can guarantee to send Business Stream, so the present invention can realize load balancing, and then realization is based on other function of load balancing.
And the present invention can be that Business Stream is selected the IP address according to the quality of service of current network state or interface, and this is present NGN networks development trend.Because in the present NGN business, a lot of problems all occur in the bearer network, thereby, improve the flexibility ratio of the selection IP address of media gateway, can avoid the network failure point that may occur, improve the call completion rate, alleviate the operation pressure that network failure brings to Virtual network operator, therefore, the present invention is significant.
Description of drawings
Fig. 1 is the structural representation of NGN network model;
Fig. 2 is the structural representation of media gateway;
Fig. 3 is the structural representation of simple NGN network;
Fig. 4 is a flow chart of realizing call business between the media gateway;
Fig. 5 is the another kind of structural representation of media gateway;
Fig. 6 is the structural representation that has increased the media gateway of address choice function;
Fig. 7 is a flow chart of realizing call business between the media gateway shown in Figure 6.
Embodiment
In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention is further described below in conjunction with the drawings and specific embodiments.
The invention provides a kind of media gateway, as shown in Figure 6, described media gateway is to increase an address selection module in the existing media gateway that comprises signaling processing module and medium process module, to realize adress analysis and to select the function of professional flow IP address.This address selection module is selected the professional flow IP address of conduct according to certain address choice strategy, and is passed this address back signaling processing module after receiving the message of application IP address of signaling processing module from a plurality of interface IP address.If Business Stream is a Media Stream, signaling processing module also can will should be sent to medium process module by the business flow IP address.
The present invention also provide a kind of in media gateway the method for distribution service flow IP address, this method is the different interface IP addresses of a plurality of interface assignment in media gateway, in needs distribution service flow IP address, from a plurality of interface IP address, select the professional flow IP address of conduct according to the address selection strategy.
Hereinafter, method of the present invention is described in detail.
Being example with the NGN network of Fig. 3 still now, a plurality of interfaces of media gateway are set to different IP addresses respectively, for the media gateway MG1 with two interface L0 and L1, is IP1 with the IP address setting of L0, is IP2 with the IP address setting of L1; For media gateway MG2 with two interface L0 and L1, be IP3 with the IP address setting of L0, be IP4 with the IP address setting of L1.When address selection module is called in signaling flow is handled, be that a Media Stream is selected the medium flow IP address according to certain strategy.
Should be appreciated that, in the present invention, selected an interface IP address, just selected this interface to come carrying media stream, promptly send and receiving media stream.So when saying that address selection module is selected certain interface, its meaning is meant that address module selected the interface IP address of this interface as the medium flow IP address.
Referring to Fig. 7, between media gateway and call server, suppose S2 by user S1 calling party, utilize method of the present invention to realize that the process of calling out is divided into following steps:
Step 701 is identical to step 405 with step 401 to step 705.
Step 706 is divided into following substep:
The signaling processing module of a, MG1 is to address selection module application medium flow IP address;
B, address selection module be according to medium flow IP address of certain address choice policy selection, as IP2, and this IP address sent to the signaling processing module of MG1;
The signaling processing module of c, MG1 sends the call server that acknowledges message to that comprises information such as MG1 Media Stream IP address ip 2, Context sign, port numbers.
Step 707 is identical with step 407.
Step 708 is divided into following substep:
The signaling processing module of a, MG2 is to address selection module application medium flow IP address;
B, address selection module be according to medium flow IP address of certain address choice policy selection, as IP3, and this IP address sent to the signaling processing module of MG2;
The signaling processing module of c, MG2 sends the call server that acknowledges message to that comprises information such as MG2 Media Stream IP address ip 3, Context sign, port numbers.
Step 709 is identical to step 411 with step 409 to step 711.
In the present embodiment, source, purpose IP address that the Media Stream of this business from MG1 to MG2 uses are IP2 and IP3, and the media gateway interface path of flowing through is that the L1 from MG1 goes out, and go into from the L0 of MG2.Source, destination address that Media Stream from MG2 to MG1 uses are IP3 and IP2, and the media gateway interface path of flowing through is that the L0 from MG2 goes out, and go into from the L1 of MG1.
This shows that in MG1, this professional Media Stream sends from L1, is also received by L1; In MG2, this professional Media Stream sends from L0, is also received by L0.The Media Stream that like this, has just guaranteed same business is consistent in the path of flowing through of media gateway interface.
When a service call application was arranged again between MG1 and MG2, signaling process and step shown in Figure 7 were similar, and just in step 706 and step 708, the address selection module of MG1 and MG2 will be selected a medium flow IP address again according to the address selection strategy.
Describe several address choice strategies that address selection module can adopt below in detail:
(1) load balancing strategy
Media gateway has had the detection method of media flow quality now, as using rtcp protocol, just can detect the mass parameters such as packet loss, time delay, shake of a Media Stream, evaluates and tests out the quality of bearer path according to these mass parameters.Usually, media gateway is by judging the mass discrepancy of interface to the statistics of Media Stream, determine current employing load balancing strategy according to mass discrepancy, if there is not mass discrepancy between the interface, the general load balancing ratio of selecting 1: 1, if the quality of service of one of them interface is higher than other interface, then selected 2: 1 or higher load balancing ratio.
Introduce the implementation that adopts load balancing pro rate medium flow IP address now.For example, to share ratio be L0 to configuration load in MG1: L1 is 2: 1, the address selection module of MG1 can be that a unit calculates with three Media Streams, wherein there is the Media Stream of two business to select the interface IP address of L0 as the medium flow IP address, the Media Stream of a business selects L1 interface IP address as the medium flow IP address, like this, just realized the load balancing of Media Stream on egress line, a kind of concrete implementation is as follows:
First professional Media Stream is selected IP1, promptly select this professional Media Stream of L0 transmission/reception;
Media Stream to second business is selected IP2, promptly selects this professional Media Stream of L1 transmission/reception;
Media Stream to the 3rd business is selected IP1, promptly selects this professional Media Stream of L0 transmission/reception;
Media Stream to the 4th business is selected IP1, promptly selects this professional Media Stream of L0 transmission/reception;
Media Stream to the 5th business is selected IP2, promptly selects this professional Media Stream of L1 transmission/reception;
Media Stream to the 6th business is selected IP1, promptly selects this professional Media Stream of L0 transmission/reception.
Other various load balancing ratios, on principle and the above-mentioned implementation of sharing ratio similar.
(2) priority policy
The interface of media gateway is provided with the order of priority, and as to MG1, preferable interface is L0, and promptly preferable interface IP address is IP1, and the preferred media flow IP address is IP1; The inferior interface that selects is L1, and promptly time selecting interface IP address is IP2, and the inferior medium flow IP address that selects is IP2.This strategy when MG1 is allocated for media streams IP address, preferentially selects IP1 as the medium flow IP address when specific implementation, in the time can't selecting IP1, selects IP2 as the medium flow IP address again.
(3) based on the State Selection strategy
When media gateway showed that to the statistics of Business Stream the current quality of service of certain interface is higher, the IP address of selecting this interface was as the medium flow IP address.For example, to detect L1 current business quality higher as MG1, promptly selects IP2 as the medium flow IP address.
(4) time-based selection strategy
In address selection module, set in advance the mapping table of time period and interface.According to asynchronism(-nization) the medium flow IP address is set, for example, between 8 o'clock to 20 o'clock of every day, MG1 selects in the mapping table IP address ip 1 with corresponding interface L0 of this time period as the medium flow IP address; 20 of every day between 8 of next day, MG1 selects in the mapping table IP address ip 2 with corresponding interface L1 of this time period as the medium flow IP address.
(5) based on the selection strategy of incident
In address selection module, set in advance the mapping table of incident and interface.According to current event difference the IP address of Media Stream is set, for example, when incident 1 took place, MG1 selected in the mapping table IP address ip 2 of the interface L1 corresponding with incident 1 as the medium flow IP address.At this, the scope of incident is wider, can be detected network failure incident or link failure incident, also can be all kinds of incidents of Virtual network operator oneself definition.
(6) strategy of the combination in any of above various selection strategies
In actual applications, above several selection strategies can be carried out combination in any, to realize more rational Media Stream IP address choice strategy.And, can adopt different selection strategies as the case may be in the different periods.For example, between 10 o'clock to 20 o'clock of every day, adopt strategy based on state, at 20 of every day to the strategy that adopts between 10 of next day based on priority.
Should be appreciated that the present invention is not limited only to above-mentioned six kinds of selection strategies, the present invention has comprised all rational selection strategies.
In the superincumbent detailed description, media gateway is to be connected on the edge router that transmits net by dual-homed, promptly be connected with two edge routers by two interfaces, the present invention does not repel the situation of two above interfaces, its principle is identical with the situation of the media gateway with two interfaces with implementation, does not also give unnecessary details at this.
Should be appreciated that the type of media gateway has multiple: Tandem Gateway, IAD, IP-IP gateway or the like, method of the present invention can be applied to above-mentioned all types of media gateway.
In concrete implementation process, can carry out suitable improvement, to adapt to the concrete needs of concrete condition to the method according to this invention.Therefore be appreciated that; just play an exemplary role according to the specific embodiment of the present invention; not in order to restriction protection scope of the present invention; for example; the present invention not only comprises the professional flow IP address of selection from a plurality of interface IP address, can also expand to and select professional flow IP address from a plurality of other IP addresses.
Claims (10)
1, a kind of media gateway, this media gateway comprises signaling processing module and medium process module, and at least two edge routers with the transmission net are connected, and interface with distinct interface IP address, signaling processing module determines that also the transport service flow IP address is to medium process module, it is characterized in that, this media gateway further comprises address selection module, this address selection module receives the Business Stream IP application IP addresses message that signaling processing module is sent, IP address of Dynamic Selection from least two IP addresses as current business flow, and pass professional flow IP address back signaling processing module.
2, media gateway according to claim 1 is characterized in that, described Business Stream is a Media Stream.
3, media gateway according to claim 1 is characterized in that, described at least two IP addresses are at least two different interface IP addresses.
4, media gateway according to claim 1 is characterized in that, described media gateway is Tandem Gateway, IAD or IP-IP gateway.
5, a kind of method of media gateway distribution service flow IP address, this media gateway have at least two interfaces that are connected with the transmission net, it is characterized in that this method comprises the steps:
A, media gateway are provided with different interface IP addresses for each is described with the interface that transmits the net connection;
B, media gateway are receiving a professional application and need be for the traffic flow assignment IP address of this business application the time, professional flow IP address as this business application of Dynamic Selection from least two different interface IP addresses.
6, method according to claim 5 is characterized in that, described Business Stream is a Media Stream.
7, method according to claim 5, it is characterized in that, the method of step B IP address of Dynamic Selection from least two different interface IP addresses is: determine to carry the interface of current business flow according to interface load balancing ratio, select the IP address of determined interface.
8, method according to claim 7 is characterized in that, described interface load balancing ratio is preestablished by media gateway, or is dynamically set according to the quality of service of current at least two interfaces by media gateway.
9, method according to claim 5, it is characterized in that, the method of step B IP address of Dynamic Selection from least two different interface IP addresses is: search for available interface successively according to the priority preset order, the present available the highest interface of priority is defined as carrying the interface of current business flow, selects the IP address of determined interface;
Perhaps, determine present network state, determine to carry the interface of current business flow, select the IP address of determined interface according to present network state;
Perhaps, from the mapping table of predefined time period and interface, search the pairing interface of current slot, pairing interface is defined as carrying the interface of current business flow, select the IP address of determined interface;
Perhaps, from the mapping table of predefined incident and interface, search the pairing interface of current event, pairing interface is defined as carrying the interface of current business flow, select the IP address of determined interface.
10, method according to claim 5 is characterized in that, described media gateway is Tandem Gateway, IAD or IP-IP gateway.
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| CN102244605B (en) * | 2010-05-10 | 2014-11-12 | 大唐移动通信设备有限公司 | Method and equipment for selecting IP addresses of application planes |
| CN103368806A (en) * | 2012-03-26 | 2013-10-23 | 华为技术有限公司 | Method and system for processing data flow and device |
| CN112511542A (en) * | 2020-12-01 | 2021-03-16 | 四川灵通电讯有限公司 | System for realizing multi-IP address network isolation in equipment and application method |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020150083A1 (en) * | 2001-04-03 | 2002-10-17 | Fangman Richard E. | System and method for performing IP telephony including internal and external call sessions |
| CN1489355A (en) * | 2002-10-10 | 2004-04-14 | 华为技术有限公司 | Network system and method for processing VOIP business based on media net-link control protocol |
| WO2004039029A1 (en) * | 2002-10-25 | 2004-05-06 | Ut Starcom (China) Co., Ltd. | A voice calling handling method using dynamic home agency technology at the whole ip framework |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2460651A (en) * | 2008-06-03 | 2009-12-09 | Data Connection Ltd | Controlling delivery of media data to a plurality of target devices in a target network |
| GB2460651B (en) * | 2008-06-03 | 2012-09-12 | Metaswitch Networks Ltd | Delivery of media data |
| US8788624B2 (en) | 2008-06-03 | 2014-07-22 | Metaswitch Networks Ltd. | System and method for controlling delivery of media data to target devices |
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| CN1756214A (en) | 2006-04-05 |
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