CN101369974B - Method and device for network grouping and message forwarding by using M3UA protocol - Google Patents
Method and device for network grouping and message forwarding by using M3UA protocol Download PDFInfo
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Abstract
The invention provides a method and device for networking using M3UA protocol and message forwarding. The method comprises following steps (a) configuring every signaling point as direct connection, quasi- direct connection office direction; (b) configuring data for direction connection and quasi direction connection;(c) routing for signaling message for message forwarding. The inventive networking method and device using M3UA protocol can routes and forwards signaling message to quasi-direction connection in IP network, keep load equilibrium.
Description
Technical field
The present invention relates to use in the communication technology M3UA to carry out the method and apparatus of networking and forwards.
Background technology
Along with traditional PSTN communication network framework to NGN (next generation network, Next GenerationNetwork) evolution of network, the application of SIGTRAN stack in the NGN net also more and more widely, M3UA (Message Transfer Part level 3 User Adaption layer particularly, Message Transfer Part third level user adaptation layer) agreement has been played the part of important role in the process of network evolution.
M3UA is generally interconnected between two Internet Protocol signaling points or IP signaling transit point, in order to the traditional Signaling System Number 7 message of transmission in IP network.When using M3UA, general by on two interconnected equipment, disposing AS (Application Server, application server), ASP (Application Server Process, application server process), data such as SCTP (Stream Control Transmission Protocol, SCTP) coupling.Wherein ASP is carried in the SCTP coupling, and ASP is the AS service, can use a plurality of ASP under the AS.
In traditional Signaling System Number 7 net, mainly message is carried out route and forwarding by MTP3 (Message Transfer Part, level 3); But, need more and more the message in the Signaling System Number 7 is transmitted in IP network along with networks development; Correspondingly, need a kind of mechanism of message being carried out route and forwarding.M3UA is as the customer adaptation layer protocol of MTP3, obtained using very widely, therefore, can make message to transmit using between the interconnected IPSP/IPSTP of M3UA by certain method, reaches the effect of routing load equilibrium.
Simultaneously, according to existing technical specification, general recommendations adopts the SLS (Signaling LinkSelection, signaling link selection) in the message to carry out routing.By link group number delivery being selected link group, and then use this SLS, select link selecting link number delivery in the link group with the SLS field; Selection to AS and ASP when using M3UA also is similar.SLS is 4 bit, and span is 0～15, chooses link with SLS, can only realize load balancing on 16 links at most; And field simultaneously twice delivery can cause in the routing regular unbalanced.In networking shown in Figure 1, IPSP1 connects to collimation in the route data of office direction and comprises a plurality of AS, and comprises a plurality of ASP (as many as dozens of) under each AS, only depends on SLS to realize that the load balancing of signaling message do not accomplish.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of method of using M3UA to carry out networking and forwards, carrying out route and forwarding to mailing to the signaling message that collimation connects in IP network, and keeps the equilibrium of load between each IPSTP.
In order to address the above problem, the invention provides a kind of method of using M3UA to carry out networking and forwards, this method may further comprise the steps:
(a) according to the networking demand each signalling point is configured to direct-connected, the company's of collimation office direction respectively;
(b) for connecting office direction, direct-connected and collimation carry out data configuration;
(c) be that the signaling message routing is to carry out forwards.
Further, in the step (a), Signalling Transfer Point is configured to direct-connected office direction, destination signaling point is configured to collimation connects office direction.
Further, in the step (b), described data configuration is included as direct-connected office direction configure application server AS and application server process ASP data, connects configuration AS and ASP data between the office direction in direct-connected office direction and collimation, and is configured to AS and the ASP data that collimation connects office direction.
Step (c) further comprises:
(c1) select collimation to connect office direction according to the Destination Point Code in the signaling message;
(c2) determine index value according to the type of service of signaling message;
(c3) choose corresponding AS and ASP according to index value for this signaling message;
(c4) send this signaling message according to selected AS and ASP.
Further, in the step (c2), described index value is to determine like this: choose the index value of the low K position of the transaction number field in the described signaling message as AS, ASP selection, K satisfies following relation: 2
KIt is the smallest positive integral that is not less than maximum AS number and maximum ASP number product.
Further, in the step (c3), AS is so selected: the high M position of described index value obtains numerical value i to the AS number X delivery that is in state of activation in the selected route data, then with the i in the route data AS that is in state of activation as the AS that selectes; Wherein, M and X satisfy relation: 2
M〉=X; I=M mod X; ASP is so selected: to choosing the ASP number Y delivery that is in state of activation among the AS, obtain numerical value j with the low N position of described index value, will choose then that j among the AS is individual to be in the ASP of state of activation as ASP undetermined; Wherein, N and Y satisfy relation: 2
N〉=Y; J=N mod Y, and satisfy K=M+N.
For solving the problems of the technologies described above, also so that networking of a kind of use M3UA and message transmission device to be provided, this device is arranged on Original Signaling Point, comprises office direction dispensing unit, data configuration unit and Dispatch Unit in the present invention, wherein,
The office direction dispensing unit is used for according to the networking demand each signalling point being configured to direct-connected, the company's of collimation office direction respectively;
The data configuration unit is used to direct-connected and the company's of collimation office direction is carried out data configuration;
Dispatch Unit is used to signaling message routing and forwarding.
Further, described office direction dispensing unit is configured to direct-connected office direction with Signalling Transfer Point, destination signaling point is configured to collimation connects office direction.
Further, described data configuration is included as direct-connected office direction configure application server AS and application server process ASP data, connects configuration AS and ASP data between the office direction in direct-connected office direction and collimation, and is configured to AS and the ASP data that collimation connects office direction.
Further, described Dispatch Unit comprises TCAP Transaction Capability Application Part TCAP module, SCCP SCCP module and M3UA module, wherein,
Described TCAP module is used for producing transaction number field and fills in signaling message;
Described SCCP module is used for determining that according to the Destination Point Code of signaling message collimation connects office direction, and determines AS and ASP according to transaction number field;
Described M3UA module is used for according to the routing forwarding message of determining.
Compared with prior art, use M3UA provided by the invention networking and message forwarding method and device can be finished in IP network and carry out route and forwarding to mailing to collimation signaling message even, and keep the equilibrium of load between each IPSTP.
Description of drawings
Fig. 1 is a typical networking diagram of the present invention;
Fig. 2 is that the present invention uses M3UA to carry out the method flow schematic diagram of networking.
Fig. 3 is for the idiographic flow schematic diagram of signaling message routing among Fig. 2.
Fig. 4 is the modular structure figure of each signalling point.
Embodiment
As shown in Figure 1, as Original Signaling Point, then concerning IPSP1, IPSP2 is that its collimation connects office direction with IPSP1, and several IPSTP are its direct-connected office directions; When Original Signaling Point need be when collimation connects office direction and sends signaling message, Original Signaling Point carries out carrying out signaling message by several direct-connected office directions of centre again after the networking to be transmitted, and is implemented in the load balancing on each transit point.
As shown in Figure 2, the present invention use M3UA carry out networking and and the method that signaling message carries out route and forwarding be may further comprise the steps:
Step 201: each signalling point is configured to direct-connected, the company's of collimation office direction respectively according to the networking demand; Wherein, several Signalling Transfer Points are configured to direct-connected office direction, destination signaling point are configured to collimation connect office direction,
Step 202: carry out data configuration for direct-connected and collimation connect office direction;
Data configuration comprises: be direct-connected office direction configuration AS and ASP data; Connect configuration AS and ASP data between the office direction in direct-connected office direction and collimation, and be configured to AS and the ASP data that collimation connects office direction.
Wherein, ASP is carried in the SCTP coupling, and ASP is the AS service, can use a plurality of ASP under the AS.
Step 203: according to certain strategy is that the signaling message routing is to carry out forwards.
The process of routing is promptly selected the process of AS and ASP from the AS of configuration and ASP data, also promptly determine the process of direct-connected office direction.
Signaling message needs to determine which transit point to carry out load sharing by when collimation connects office direction and sends, promptly which AS to be routed to collimation and to connect office direction by, as shown in Figure 3, for the process of signaling message routing comprises:
Step 301:SCCP protocol module is determined the i.e. company's of the collimation office direction of destination signaling point according to the DPC in the signaling message (Destination Point Code).
Determine also just to have determined to arrive the route data that this collimation connects office direction, the i.e. said selected route data in back after the collimation office direction.
Step 302: choose the index value of the low K position bit of the TACP transaction number field in the message as the AS/ASP selection;
Transaction number field is the field that can identify a business procedure relevant with type of service, and it is produced and filled in the signaling message by the TCAP module; This field is 16 integers, the low K position (as choosing least-significant byte) of choosing this field is as index value, be because transaction number field for the upper-layer service process produces, remains unchanged in the per call business and be unique, guarantee that the message of same service call sends by identical path.
Select low K position, be because this transaction number field is to begin to change from low level, constantly add up, have only when low level is added to certain value high position and just can add up, adopt and change comparatively frequent and uniform part, can guarantee to select in turn each different routes, thereby between a plurality of ASP of a plurality of AS of office direction route data and each AS, realize load balancing.
Wherein, K satisfies following relation: 2
KBe the smallest positive integral that is not less than maximum AS number and maximum ASP number product, K generally can be above 8.
Step 303: select AS;
In general, AS and ASP have states such as ACTIVE, INACTIVE; General as long as data configuration and network are normal, AS just is in ACTIVE (activation) state.
The high M position of index of reference value obtains numerical value i to AS number (X) delivery that is in state of activation in the selected route data, then activates AS as selected AS with i in the route data;
Wherein, M and X satisfy relation: 2
M〉=X; I=M mod X
Other M position also can be realized strictly, as long as it does not have repetition just passable with following N position.In our algorithm, be that M position and N position piece together just in time be the integer of a K position.
Step 304: select ASP;
The low N of index of reference value (being K-M) position obtains numerical value j to choosing ASP number (Y) delivery that is in state of activation among the AS, then will choose j among the AS to activate ASP as selected ASP;
Wherein, N and Y satisfy relation: 2
N〉=Y; J=N mod Y
For instance, if the AS number in the route data of a collimation even office direction is no more than 8, the ASP number among each AS is no more than 32, then can select the least-significant byte of transaction number field as index value, choose the Senior Three position of index value, from selected route data, select AS; Choose index value low 5, from selected route data, select ASP.
In the practical application, can correspondingly adjust the figure place of choosing transaction number according to the AS and the ASP number of configuration.
Step 305: on Original Signaling Point by the M3UA module according to selected routing forwarding message.
In concrete realization, each signalling point all might become Original Signaling Point.For realizing above networking and message forwarding method, the Original Signaling Point of transmitting message at needs has networking and message transmission device, and this device comprises office direction dispensing unit, data configuration unit and Dispatch Unit, wherein,
The office direction dispensing unit is used for according to the networking demand each signalling point being configured to direct-connected, the company's of collimation office direction respectively; Wherein, several Signalling Transfer Points are configured to direct-connected office direction, destination signaling point are configured to collimation connect office direction,
The data configuration unit is used to direct-connected and the company's of collimation office direction is carried out data configuration;
Dispatch Unit, be used for being the signaling message routing and transmitting according to certain strategy, particularly, Dispatch Unit comprises TCAP (Transaction Capabilities Application Part, TCAP Transaction Capability Application Part) protocol module, SCCP module and M3UA module, as shown in Figure 4.
The TCAP module is used for producing transaction number field and fills in signaling message;
The SCCP module, the DPC (Destination Point Code) that is used for according to signaling message determines the i.e. company's of the collimation office direction of destination signaling point, and determines AS and ASP (promptly determining route) according to transaction number field, determines that the method for route is the same;
The M3UA module is used for according to the routing forwarding message of determining.
With SCCP (Signalling Connection Control Part, SCCP) UDT (Unit Data, unit data) message is example, this message mails to collimation Lian Jushi, transaction number in the employing TCAP message is as index value, and this value is the positive integer for constantly adding up in realization; The SCCP module decided the AS and the ASP that will select according to the transaction number in the UDT message before message being mail to the company's of collimation office direction by the M3UA module; The M3UA module is transmitted message according to the AS and the ASP that select.
So far, a message connects office direction to collimation and sends, and the flow process of a message transmission is through with; Transmission to follow-up each message will repeat above process.
When choosing route, choose unique index value for business procedure each time, each message in this process all has this identical index value.Numerical value according to the index value certain bits is selected AS and ASP.Because the message in business procedure has identical index value, can guarantee that therefore they select same AS and same ASP.Simultaneously, because field value when a large amount of calling the in selected index value place evenly distributes, can make the selection equilibrium of AS and ASP, thereby the transmission that guarantees signaling message realizes load balancing.
Certainly, the present invention also can have other various embodiments, as waiting other upper-layer protocol for ISUP (ISDN User Part, ISDNYong Hubufen), can adopt similar method to carry out networking and route; Under the situation that does not deviate from spirit of the present invention and essence thereof, those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Compared with prior art, the networking method of employing M3UA provided by the invention can be finished in IP network and carry out route and forwarding to mailing to collimation signaling message even, and keep the equilibrium of load between each IPSTP.
Claims (8)
1. a method of using M3UA to carry out networking and forwards is characterized in that, this method may further comprise the steps:
(a) according to the networking demand each signalling point is configured to direct-connected, the company's of collimation office direction respectively;
(b) for connecting office direction, direct-connected and collimation carry out data configuration, described data configuration is included as direct-connected office direction configure application server AS and application server process ASP data, connect configuration AS and ASP data between the office direction in direct-connected office direction and collimation, and be configured to AS and the ASP data that collimation connects office direction;
(c) be that the signaling message routing is to carry out forwards.
2. the method for claim 1 is characterized in that: in the step (a), Signalling Transfer Point is configured to direct-connected office direction, destination signaling point is configured to collimation connects office direction.
3. the method for claim 1 is characterized in that, step (c) further comprises:
(c1) select collimation to connect office direction according to the Destination Point Code in the signaling message;
(c2) determine index value according to the type of service of signaling message;
(c3) choose corresponding AS and ASP according to index value for this signaling message;
(c4) send this signaling message according to selected AS and ASP.
4. method as claimed in claim 3 is characterized in that, in the step (c2), described index value is to determine like this: choose the index value of the low K position of the transaction number field in the described signaling message as AS, ASP selection, K satisfies following relation: 2
KIt is the smallest positive integral that is not less than maximum AS number and maximum ASP number product.
5. method as claimed in claim 4, it is characterized in that, in the step (c3), AS is selected like this: the high M position of described index value is to the AS number X delivery that is in state of activation in the selected route data, obtain numerical value i, the AS that then i in the route data is in state of activation is as the AS that selectes; Wherein, M and X satisfy relation: 2
M〉=X; I=M mod X; ASP is so selected: to choosing the ASP number Y delivery that is in state of activation among the AS, obtain numerical value j with the low N position of described index value, then will choose j ASP that is in state of activation among the AS as the ASP that selectes; Wherein, N and Y satisfy relation: 2
N〉=Y; J=N mod Y, and satisfy K=M+N.
6. one kind is used M3UA networking and message transmission device, it is characterized in that this device is arranged on Original Signaling Point, comprises office direction dispensing unit, data configuration unit and Dispatch Unit, wherein,
The office direction dispensing unit is used for according to the networking demand each signalling point being configured to direct-connected, the company's of collimation office direction respectively;
The data configuration unit, be used to direct-connected and collimation connects office direction and carries out data configuration, described data configuration is included as direct-connected office direction configure application server AS and application server process ASP data, connect configuration AS and ASP data between the office direction in direct-connected office direction and collimation, and be configured to AS and the ASP data that collimation connects office direction;
Dispatch Unit is used to signaling message routing and forwarding.
7. device as claimed in claim 6 is characterized in that, described office direction dispensing unit is configured to direct-connected office direction with Signalling Transfer Point, destination signaling point is configured to collimation connects office direction.
8. device as claimed in claim 6 is characterized in that, described Dispatch Unit comprises TCAP Transaction Capability Application Part TCAP module, SCCP SCCP module and M3UA module, wherein,
Described TCAP module is used for producing transaction number field and fills in signaling message;
Described SCCP module is used for determining that according to the Destination Point Code of signaling message collimation connects office direction, and determines AS and ASP according to transaction number field;
Described M3UA module is used for according to the routing forwarding message of determining.
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