CN104581774A - Method for building interface between heterogeneous networks, MME (mobile management equipment) and heterogeneous networks - Google Patents
Method for building interface between heterogeneous networks, MME (mobile management equipment) and heterogeneous networks Download PDFInfo
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- CN104581774A CN104581774A CN201310485250.4A CN201310485250A CN104581774A CN 104581774 A CN104581774 A CN 104581774A CN 201310485250 A CN201310485250 A CN 201310485250A CN 104581774 A CN104581774 A CN 104581774A
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Abstract
The embodiment of the invention provides a method for building an interface between heterogeneous networks, MME (mobile management equipment) and the heterogeneous networks. The method is used for the MME, a first interface SGs is built between the MME and an MSC SERVER (mobile switching center server), and the MME launches inquiries to a DNS (domain name system) to obtain an IP (internet protocol) address and a port number of the MSC SERVER corresponding to the built first interface; the MME as well as the MSC SERVER builds stream control transmission protocol coupling according to the IP address and the port number; the MME launches a service procedure on stream control transmission protocol coupling, the IP address, a port and terminal information of the MME are recorded by the MSC SERVER, and connection of the service procedure is built. DNS equipment is introduced, translation of SCTP coupling and translation of TA (tracking area) mapping are achieved through the DNS, and the number of SGs interfaces is reduced.
Description
Technical field
The present invention relates to heterogeneous network technologies, refer to method, mobility management apparatus and the heterogeneous network of setting up interface between a kind of heterogeneous network especially.
Background technology
Current LTE network (TDD, FDD) is just becoming the development trend of the communications industry.For solving the phonetic problem of terminal, CSFB technology is a kind of important solutions that 3GPP recommends.In the world, each large mainstream carrier deploys circuit domain dropping background (CSFB, Circuit Switched Fallback) in succession to provide voice service.In CSFB technology, need mobile softswitch node (the MSC SERVER of 2G & 3G network, Mobile Switching Center Server) and 4G network mobility management equipment (MME) between open SGs interface, the protocol hierarchy of SGs interface is SGsAP/SCTP/IP.
Implementation at present about SGs interface is all based on static configuration-human configuration and safeguards SCTP coupling and mapping table: first, MSC SERVER and MME is deployed on unified bearer network, in the VPN as mobile bearer network (China mobile SG).Secondly, on MME and MSC SERVER, human configuration SCTP coupling link; The mapping table of human configuration TA (4G radio tracking district), LA (2G & 3G wireless position district), MSC ID on MME, MSC SERVER is without the need to configuring this corresponding relation.Finally, do after starting up of terminal when co-location upgrades and set up SGs interface, and carry out Signalling exchange in the processes such as follow-up MO, MT and note.
There are the following problems for prior art: be unfavorable for network operation: because this static configuration SGs interface needs manual maintenance SCTP coupling circuit, and under group POOL pattern, this corresponding relation is complicated, needs the coupling enormous amount safeguarded.Such as, as shown in Figure 1, for the network environment of certain center, there is 1 PS POOL, according to target combination network pattern is containing 6 MME/SGSN, 2 CS POOL (CS POOL1 and CS POOL2), there are 7 MSC SERVER in each CS POOL, now have 2*6*7=84 bar SCTP coupling, if open 2 links in every bar coupling, then have 168 links to need to safeguard, the workload of manual maintenance is very big.
Be unfavorable for optimizing and revising: the thing for the wireless adjustment of operator being very normality, if now relate to boundary adjustment, then need the corresponding relation adjusting TA, LA, MSCID on all MME related to, therefore this mode makes the degree of coupling of many nets very high, is unfavorable for optimizing and revising of network.
Be unfavorable for network security: the mode of static configuration easily causes POOL internal loading unbalanced, such as under SGs does not connect networking situation entirely, the network element high load capacity opening SGs interface may be caused, and then cause high load capacity telephone traffic of network element to overflow, affect network security.
Summary of the invention
The technical problem to be solved in the present invention is to provide method, mobility management apparatus and the heterogeneous network of setting up interface between a kind of heterogeneous network, solve the SGs interface of static configuration in prior art and need manual maintenance SCTP coupling circuit, cause being unfavorable for network operation, optimize and revise and the defect of safety.
For solving the problems of the technologies described above, embodiments of the invention provide a kind of method setting up interface between heterogeneous network, are applied to mobility management apparatus MME, support to set up first interface SGs between mobility management apparatus and mobile softswitch node M SC SERVER; Method comprises: mobility management apparatus initiates to domain name system DNS IP address and the port numbers that inquiry obtains the mobile softswitch node set up corresponding to first interface; Mobility management apparatus sets up SCTP coupling according to described IP address and port numbers and described mobile softswitch node; Mobility management apparatus initiates operation flow in described SCTP coupling, by the IP address of mobility management apparatus described in mobile softswitch nodes records, port and end message, sets up the connection of described operation flow.
In described method, mobility management apparatus also comprised before domain name system DNS initiates inquiry: in described DNS, increase interface, be connected in the VPN (virtual private network) VPN at first interface place by the interface increased, described VPN (virtual private network) comprises described mobile softswitch node and mobility management apparatus.
In described method, mobility management apparatus is initiated inquiry to domain name system DNS and is obtained the IP address of setting up mobile softswitch node corresponding to first interface and port numbers specifically comprises: mobility management apparatus initiates first time inquiry according to radio tracking district information to DNS, obtains wireless position district information; Mobility management apparatus initiates second time inquiry according to described wireless position district information to DNS, obtains the host name, port numbers and the priority weights level that are arranged in the mobile softswitch node in circuit domain pond; Mobility management apparatus selectes concrete mobile softswitch node according to described weight and priority, initiates third time inquiry, obtain the IP address of first interface place mobile softswitch node according to described host name to selected mobile softswitch node.
In described method, mobility management apparatus also comprised before domain name system DNS initiates inquiry: arrange described DNS and comprise main DNS and standby DNS.
A kind of mobility management apparatus, comprising: IP acquiring unit, for initiating IP address and the port numbers that inquiry obtains the mobile softswitch node set up corresponding to first interface to domain name system DNS; Coupling member, for setting up SCTP coupling according to described IP address and port numbers and described mobile softswitch node; Business initiates unit, for initiating operation flow in described SCTP coupling, by the IP address of mobility management apparatus described in mobile softswitch nodes records, port and end message, sets up the connection of described operation flow.
In described mobility management apparatus, described DNS has GN/S5/S8 interface, and there is the interface of increase, the interface of described increase is for being connected in the VPN (virtual private network) VPN at first interface place, and described VPN (virtual private network) comprises described mobile softswitch node and mobility management apparatus.
In described mobility management apparatus, IP acquiring unit comprises: the first enquiry module, for initiating first time inquiry according to radio tracking district information to DNS, obtains wireless position district information; Second enquiry module, for initiating second time inquiry according to described wireless position district information to DNS, obtains the host name, port numbers and the priority weights level that are arranged in the mobile softswitch node in circuit domain pond; 3rd enquiry module, for selecting concrete mobile softswitch node according to weight and priority, initiating third time inquiry according to described host name to selected mobile softswitch node, obtaining the IP address of first interface place mobile softswitch node.
In described mobility management apparatus, described DNS comprises main DNS and standby DNS.
A kind of heterogeneous network, comprise mobility management apparatus, described mobility management apparatus comprises: IP acquiring unit, for initiating IP address and the port numbers that inquiry obtains the mobile softswitch node set up corresponding to first interface to domain name system DNS; Coupling member, for setting up SCTP coupling according to described IP address and port numbers and described mobile softswitch node; Business initiates unit, for initiating operation flow in described SCTP coupling, by the IP address of mobility management apparatus described in mobile softswitch nodes records, port and end message, sets up the connection of described operation flow.
In described heterogeneous network, IP acquiring unit comprises: the first enquiry module, for initiating first time inquiry according to radio tracking district information to DNS, obtains wireless position district information; Second enquiry module, for initiating second time inquiry according to described wireless position district information to DNS, obtains the host name, port numbers and the priority weights level that are arranged in the mobile softswitch node in circuit domain pond; 3rd enquiry module, for selecting concrete mobile softswitch node according to described weight and priority, initiating third time inquiry according to described host name to selected mobile softswitch node, obtaining the IP address of first interface place mobile softswitch node.
The beneficial effect of technique scheme of the present invention is as follows: introduce DNS equipment, is realized the interpretative function of SCTP coupling, TA mapping by DNS.SGs interface now between MME, MSC SERVER, set up without the need to manual static, all configurations are all realized by the translation of DNS, and relative to manual static configuration before, its quantity greatly reduces, and network configuration is more reasonable.
Accompanying drawing explanation
Fig. 1 represents that static configuration SGs interface sets up the schematic diagram of SCTP coupling circuit;
Fig. 2 represents a kind of schematic flow sheet setting up the method for SGs interface between heterogeneous network;
Fig. 3 represents the schematic diagram of the operation flow of heterogeneous network.
Embodiment
For making the technical problem to be solved in the present invention, technical scheme and advantage clearly, be described in detail below in conjunction with the accompanying drawings and the specific embodiments.
Based on the mode that domain name system (DNS) is resolved, introduce DNS equipment, realized the interpretative function of SCTP coupling, TA mapping by DNS.SGs interface now between MME, MSC SERVER, set up without the need to manual static, all configurations are all realized by the translation of DNS.
SGs interface is the interface between SGSN and mobile softswitch node M SC SERVER, and by this first interface, SGSN sends the positional information of mobile subscriber to MSC SERVER, receives the paging request of MSC SERVER simultaneously.
The embodiment of the present invention provides a kind of method setting up interface between heterogeneous network, be applied to mobility management apparatus MME, as shown in Figure 2, first interface (SGs interface) has been opened between mobile softswitch node M SC SERVER and mobility management apparatus MME;
Method comprises:
Step 1, mobility management apparatus initiates to domain name system DNS IP address and the port numbers that inquiry obtains the mobile softswitch node set up corresponding to first interface;
Step 2, mobility management apparatus sets up SCTP coupling (SCTP, STREAM CONTROL TRANSMISSION PROTOCOL) according to described IP address and port numbers and described mobile softswitch node;
Step 3, mobility management apparatus initiates operation flow in described SCTP coupling, by the IP address of mobility management apparatus described in mobile softswitch nodes records, port and end message, sets up the connection of described operation flow.
The technical scheme provided is provided, introduce DNS equipment, the interpretative function of SCTP coupling, TA mapping is realized by DNS, first interface-SGs interface between MME and MSC SERVER is set up without the need to manual static, all configurations are all realized by the translation of DNS, relative to existing manual static configuring technical, reduce the quantity of SGs interface, network configuration is more reasonable.
DNS equipment is the key equipment of system, and the deployment of DNS can utilize the DNS equipment of existing GN/S5/S8 interface, now needs DNS to increase interface, is connected in the VPN of SGs; Also can the special DNS equipment of newly-built independence.
DNS has GN/S5/S8 interface, and in a preferred embodiment, mobility management apparatus also comprised before domain name system DNS initiates inquiry:
In described DNS, increase interface, be connected in the VPN (virtual private network) VPN at first interface place by the interface increased, described VPN (virtual private network) comprises described mobile softswitch node and mobility management apparatus.
In a preferred embodiment, as shown in Figure 2, mobility management apparatus also comprised before domain name system DNS initiates inquiry: arrange described DNS and comprise main DNS and standby DNS.
Consider in the DNS of existing GN/S5/S8 have the information such as TA, LA, therefore utilize the scheme of existing GN/S5/S8 interface DNS.
In a preferred embodiment, mobility management apparatus is initiated inquiry to domain name system DNS and is obtained the IP address of setting up mobile softswitch node corresponding to first interface and port numbers specifically comprises:
Step 01, mobility management apparatus initiates first time inquiry according to radio tracking district information to DNS, obtains wireless position district information;
Step 02, mobility management apparatus initiates second time inquiry according to described wireless position district information to DNS, obtains the host name, port numbers and the priority weights level that are arranged in the mobile softswitch node in circuit domain pond (CS POOL1 and CS POOL2); Mobility management apparatus is positioned at packet-switched domain pond (PS POOL).
Step 03, mobility management apparatus selectes concrete mobile softswitch node according to described weight and priority, initiates third time inquiry, obtain the IP address of first interface place mobile softswitch node according to described host name to selected mobile softswitch node.
In an application scenarios, as shown in Figure 3, operation flow comprises:
Step 1, terminal initiates CSFB business, and this CSFB business is caller class business, as MO, co-location renewal etc.
Step 2a, MME inquire about DNS, and use FQDN mode to adopt NAPTR to record and carry out first time inquiry, input information is TA, exports LA information.NAPTR record is as follows:
Step 2b, MME carry out employing SRV and record second time inquiry, and input information is LA, and output information is MSC SERVER SGs host name, port numbers and priority weights level.SRV record is as follows:
Step 2c, MME select MSC Server according to weight and priority, and adopt A record to carry out third time inquiry afterwards, input information is MSC SERVER SGs Interface Host name, and output information is the IP address of MSCSGs Interface Host name.A record is as follows:
Step 2a, step 2b and step 2c are DNS query process, and step 2a wherein and step 2b can merge into a process.
Step 3, MME records the corresponding relation of TA information and LA information, and according to the IP address obtained and port numbers, sets up SCTP coupling.
Step 4, MME, in the SCTP coupling of having set up, sends out SGs AP signaling, initiates business (co-location, MO calling service) flow process.
Step 5, MSC SERVER records address, port and the end message of initiator (MME).Now called service becomes possibility.
Step 6, traffic signaling is normally mutual, connection of dismantling after completing described business.
The embodiment of the present invention provides a kind of mobility management apparatus, comprising:
IP acquiring unit, for initiating IP address and the port numbers that inquiry obtains the mobile softswitch node set up corresponding to first interface to domain name system DNS;
Coupling member, for setting up SCTP coupling according to described IP address and port numbers and described mobile softswitch node;
Business initiates unit, for initiating operation flow in described SCTP coupling, by the IP address of mobility management apparatus described in mobile softswitch nodes records, port and end message, sets up the connection of described operation flow.
In a preferred embodiment, described DNS has GN/S5/S8 interface, and there is the interface of increase, the interface of described increase is for being connected in the VPN (virtual private network) VPN at first interface place, and described VPN (virtual private network) comprises described mobile softswitch node and mobility management apparatus.
In a preferred embodiment, IP acquiring unit comprises:
First enquiry module, for initiating first time inquiry according to radio tracking district information to DNS, obtains wireless position district information;
Second enquiry module, for initiating second time inquiry according to described wireless position district information to DNS, obtains the host name, port numbers and the priority weights level that are arranged in the mobile softswitch node in circuit domain pond;
3rd enquiry module, for selecting concrete mobile softswitch node according to described weight and priority, initiating third time inquiry according to described host name to selected mobile softswitch node, obtaining the IP address of first interface place mobile softswitch node.
In a preferred embodiment, as shown in Figure 2, described DNS comprises main DNS and standby DNS.
In a preferred embodiment, mobility management apparatus also comprises:
Tear linkage unit open, for connection of dismantling after completing described business.
As shown in Figure 3, the embodiment of the present invention provides a kind of heterogeneous network, comprises mobility management apparatus, and described mobility management apparatus comprises:
IP acquiring unit, for initiating IP address and the port numbers that inquiry obtains the mobile softswitch node set up corresponding to first interface to domain name system DNS;
Coupling member, for setting up SCTP coupling according to described IP address and port numbers and described mobile softswitch node;
Business initiates unit, for initiating operation flow in described SCTP coupling, by the IP address of mobility management apparatus described in mobile softswitch nodes records, port and end message, sets up the connection of described operation flow.
In a preferred embodiment, IP acquiring unit comprises:
First enquiry module, for initiating first time inquiry according to radio tracking district information to DNS, obtains wireless position district information;
Second enquiry module, for initiating second time inquiry according to described wireless position district information to DNS, obtains the host name, port numbers and the priority weights level that are arranged in the mobile softswitch node in circuit domain pond;
3rd enquiry module, for selecting concrete mobile softswitch node according to described weight and priority, initiating third time inquiry according to described host name to selected mobile softswitch node, obtaining the IP address of first interface place mobile softswitch node.
Advantage after employing this programme is: introduce DNS equipment, the interpretative function of SCTP coupling, TA mapping is realized by DNS, SGs interface now between MME and MSC SERVER is set up without the need to manual static, all configurations are all realized by the translation of DNS, relative to existing manual static configuring technical, its quantity greatly reduces, and network configuration is more reasonable.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from principle of the present invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. between heterogeneous network, set up a method for interface, be applied to mobility management apparatus MME, it is characterized in that, support between mobility management apparatus and mobile softswitch node M SC SERVER to set up first interface SGs;
Method comprises:
Mobility management apparatus initiates to domain name system DNS IP address and the port numbers that inquiry obtains the mobile softswitch node set up corresponding to first interface;
Mobility management apparatus sets up SCTP coupling according to described IP address and port numbers and described mobile softswitch node;
Mobility management apparatus initiates operation flow in described SCTP coupling, by the IP address of mobility management apparatus described in mobile softswitch nodes records, port and end message, sets up the connection of described operation flow.
2. method according to claim 1, is characterized in that, mobility management apparatus also comprised before domain name system DNS initiates inquiry:
In described DNS, increase interface, be connected in the VPN (virtual private network) VPN at first interface place by the interface increased, described VPN (virtual private network) comprises described mobile softswitch node and mobility management apparatus.
3. method according to claim 1, is characterized in that, mobility management apparatus is initiated inquiry to domain name system DNS and obtained the IP address of setting up mobile softswitch node corresponding to first interface and port numbers specifically comprises:
Mobility management apparatus initiates first time inquiry according to radio tracking district information to DNS, obtains wireless position district information;
Mobility management apparatus initiates second time inquiry according to described wireless position district information to DNS, obtains the host name, port numbers and the priority weights level that are arranged in the mobile softswitch node in circuit domain pond;
Mobility management apparatus selectes concrete mobile softswitch node according to described weight and priority, initiates third time inquiry, obtain the IP address of first interface place mobile softswitch node according to described host name to selected mobile softswitch node.
4. method according to claim 1, is characterized in that, mobility management apparatus also comprised before domain name system DNS initiates inquiry:
Described DNS is set and comprises main DNS and standby DNS.
5. a mobility management apparatus, is characterized in that, comprising:
IP acquiring unit, for initiating IP address and the port numbers that inquiry obtains the mobile softswitch node set up corresponding to first interface to domain name system DNS;
Coupling member, for setting up SCTP coupling according to described IP address and port numbers and described mobile softswitch node;
Business initiates unit, for initiating operation flow in described SCTP coupling, by the IP address of mobility management apparatus described in mobile softswitch nodes records, port and end message, sets up the connection of described operation flow.
6. mobility management apparatus according to claim 5, is characterized in that,
Described DNS has GN/S5/S8 interface, and has the interface of increase, and the interface of described increase is for being connected in the VPN (virtual private network) VPN at first interface place, and described VPN (virtual private network) comprises described mobile softswitch node and mobility management apparatus.
7. mobility management apparatus according to claim 5, is characterized in that, IP acquiring unit comprises:
First enquiry module, for initiating first time inquiry according to radio tracking district information to DNS, obtains wireless position district information;
Second enquiry module, for initiating second time inquiry according to described wireless position district information to DNS, obtains the host name, port numbers and the priority weights level that are arranged in the mobile softswitch node in circuit domain pond;
3rd enquiry module, for selecting concrete mobile softswitch node according to described weight and priority, initiating third time inquiry according to described host name to selected mobile softswitch node, obtaining the IP address of first interface place mobile softswitch node.
8. mobility management apparatus according to claim 5, is characterized in that, described DNS comprises main DNS and standby DNS.
9. a heterogeneous network, is characterized in that, comprises mobility management apparatus, and described mobility management apparatus comprises:
IP acquiring unit, for initiating IP address and the port numbers that inquiry obtains the mobile softswitch node set up corresponding to first interface to domain name system DNS;
Coupling member, for setting up SCTP coupling according to described IP address and port numbers and described mobile softswitch node;
Business initiates unit, for initiating operation flow in described SCTP coupling, by the IP address of mobility management apparatus described in mobile softswitch nodes records, port and end message, sets up the connection of described operation flow.
10. heterogeneous network according to claim 9, is characterized in that, IP acquiring unit comprises:
First enquiry module, for initiating first time inquiry according to radio tracking district information to DNS, obtains wireless position district information;
Second enquiry module, for initiating second time inquiry according to described wireless position district information to DNS, obtains the host name, port numbers and the priority weights level that are arranged in the mobile softswitch node in circuit domain pond;
3rd enquiry module, for selecting concrete mobile softswitch node according to described weight and priority, initiating third time inquiry according to described host name to selected mobile softswitch node, obtaining the IP address of first interface place mobile softswitch node.
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