CN1281095C

CN1281095C - A method for supporting large capacity call process in BSC system by multi-module MSC

Info

Publication number: CN1281095C
Application number: CN 200310118441
Authority: CN
Inventors: 张学军; 王如明
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2003-12-16
Filing date: 2003-12-16
Publication date: 2006-10-18
Anticipated expiration: 2023-12-16
Also published as: CN1547415A

Abstract

The present invention discloses a processing method for supporting call in a BSC system with large capacity by multi-module MSC. Each MSC module evaluates the load of the module in real time; after a signalling link of the MSC module receives a call service request message from BSC, according to the load condition of each MSC module, the module for processing service is selected; a free ground circuit configured for the selected module is occupied in advance in a data base; the message is sent to the selected module, and SCCP connection is established; an A opening process and a call control process are also established on the selected module; a received subsequent message connected with SCCP of the call and a manage message of the ground circuit received by an A opening are sent to the module to be processed. The present invention leads the SCCP connection to be arranged on the MSC module where the ground circuit is positioned, which leads the SCCP connection, the A opening and CC to be arranged on the same module. The processing operation in MSC for the call is simplified, and the matching of processing capacity of multi-module MSC can be realized.

Description

A kind of multimode MSC supports the call processing method in the big capacity BSC system

Technical field

The present invention relates to the mobile communication exchange field of (comprising GSM, CDMA, 3G), be specifically related to the method that the A interface signaling is connected with signaling in No. seven SCCP (SCCP) the signaling field and volume of business cooperates of mobile switch.

Background technology

At GSM (and CDMA, in technical specification 3G), MSC (mobile switching centre, or title exchange) with BSC (base station controller, be BS at CDMA) interface be called the A mouth, in GSM (and CDMA, 3G) mobile exchange field, the A mouth is by the communication standard definition, and the development separately that the A mouth is standardized as MSC and BSC equipment provides reliable assurance.

At present, each MSC supports user's capacity about 100,000 to 400,000, and nearly all MSC device fabrication commercial city is to use the multimode technology, and for example: the capacity of each module is 40,000, and so, the exchange of 10 modules just can be supported 400,000 mobile subscriber.And each module of same MSC all has oneself a cover signaling and business function usually.

BSC equipment development merchant also improves constantly the support user's of every BSC capacity, for example more than 100,000.Therefore, when MSC cooperates with BSC, certainly will a BSC capacious to be received on several modules of a MSC office.Because when a module was unusual, this BSC business can be born by other modules, therefore, so also can improve the reliability of whole system temporarily.

In application number is 02139392.3 Chinese patent application, a kind of multimode No.7 signalling system SCCP distribution task processing method is disclosed, the SCCP of a plurality of modules is a shared LRN by the global administration's interface unified management between SCCP and SCCP user (local connection reference) resources bank towards the coupling part, each module fixed allocation resource not when system initialization, just when starting, a module just from resources bank, applies for a part of LRN resource, remaining reserved resources in the resources bank waits for that application utilized or application use once more when the LRN of certain module resource uses up after when other modules started.

The management of LRF in this patent application is too complicated, and in actual use, LRF has 3 bytes, and total 256*256*256 kind value can shortage.At the A mouth, the bottleneck of MSC is not LRF during calling, but the land circuit of A mouth.

Mobile phone is initiated any when professional, all will set up the SCCP signaling at the A mouth and connect.For calling out, need carry out the signaling connection cooperation of SCCP and the distribution use of land circuit simultaneously at the A mouth.SCCP connects with the A mouth and is based upon on the MSC module that the signaling link of receiving the SCCP connection request directly links to each other in the prior art, and when once professional, may there be the not problem on same MSC module of signaling connection and land circuit, such as, at same BSC, all land circuits to this BSC exhaust on the module that has, and the module that has has only disposed land circuit, and all land circuits to this BSC exhaust etc. on the module that has.

Call out control (being called for short CC) and can only manage the land circuit on this MSC module, at signaling link and land circuit during not in same MSC module, CC is based upon on the module at land circuit place and (all interacting messages of CC process and BSC or mobile phone are all specifically carried out by the A mouth with the A mouth, comprise that SCCP connects and the business of land circuit) not in the processing of same module, this will make inner call treatment become extremely complicated, particularly call out, will call out under the situation about switching.Therefore, how to arrange SCCP connection, the A mouth of same call, the position of three functives of CC, become problem demanding prompt solution.This also be the MSC of multimode support big capacity BSC the key technical problem that must solve.

In addition, support in the system of big capacity BSC, also need the disposal ability of several modules to be mated, the disposal ability of each module and resource are effectively utilized by burden apportionment at multimode MSC.

Prior art still fails to address the above problem at present.

Summary of the invention

The technical problem to be solved in the present invention provides a kind of multimode MSC and supports SCCP to be connected call processing method in the big capacity BSC system on the MSC module at the land circuit place that be based upon same call, simplifies the processing of MSC inside to calling out.

In order to solve the problems of the technologies described above, to the invention provides a kind of multimode MSC and support to may further comprise the steps call processing method in the big capacity BSC system:

(a) load of each this module of MSC module real-time assessment;

(b) after the signaling link of MSC module is received the call business request message of coming from BSC, judge professional kind in the routing daemon decoding of the SCCP of this module;

(c), in database, take an idle land circuit in advance for this chosen module configuration according to the selected module of carrying out Business Processing of the load condition of each MSC module;

(d) be the source address reference that one of this call distribution comprises described chosen module information, the SCCP that described business request information is sent to chosen module sets up SCCP and connects towards connection process;

(e) A mouth process and calling control process also are based upon on the described chosen module, and carry out land circuit on the opportunity of regulation and distribute;

(f) subsequent message that the BSC that receives is connected about described SCCP, the routing daemon of SCCP is determined corresponding processing module according to the module information in the destination address reference in the SCCP message, and described subsequent message is sent to the SCCP connection process processing of this processing module;

(g) the land circuit administrative messag that receives for the A mouth, SCCP sends to the A mouth of receiving module earlier, determines module under this land circuit by the A mouth according to data configuration, and the A mouth that sends to corresponding module is then handled.

In order to realize the coupling of several MSC modules to the disposal ability of big capacity BSC, land circuit is distributed on each module as much as possible, can adopt the selected method of following load evaluation and module: in above-mentioned steps (a), the CPU usage of each this module of MSC module real-time assessment and the situation that takies of land circuit, and the result is synchronized to each module; Corresponding when described step (c) is selected Service Processing Module, as preferentially to select described signaling link and connected module when this module load does not have surplus, surpasses the module of setting thresholding from CPU usage again, selects the minimum module of ground circuit usage.

As from the foregoing, the signaling that the present invention sets up the SCCP layer connects the signaling link disengaging with configuration physically, SCCP is connected on the MSC module at the land circuit place that is based upon same call, thereby SCCP connection, A mouth, three functives of CC are based upon on the same module, have simplified of the processing of MSC inside calling out.In addition, by to the real-time assessment of each module CPU usage and estimating to the ground circuit usage, when the CPU occupation rate is no more than the setting thresholding, SCCP connection and land circuit are based upon on the maximum module of idle land circuit, taken into account the coupling of several MSC modules to the disposal ability of big capacity BSC, can make full use of the resource of each module, and the load of land circuit is distributed on each module as much as possible.

Description of drawings

Fig. 1 is signaling link and the land circuit wiring schematic diagram of multimode MSC and big capacity BSC.

Fig. 2 is the separation process schematic diagram of embodiment of the invention SCCP connection and signaling link.

Fig. 3 is the flow chart of embodiment of the invention call processing method.

Embodiment

Below in conjunction with accompanying drawing, embodiments of the invention are elaborated.

The multimode MSC of present embodiment comprises MSC modules A, B, C, the signaling link of a big capacity BSC and this multimode MSC and land circuit configuring condition as shown in Figure 1, dotted line is a signaling link among the figure, solid line is a land circuit.Wherein signaling link is received on two MSC modules A, the B, and land circuit is received on three MSC modules A, B, the C.

Please refer to Fig. 2, in said system, receive the business request information of handset call when the signaling link of a MSC module after, through MTP2 (Message Transfer Part, signaling link layer), MTP3 (Message Transfer Part, NML) sends to the SCCP routing daemon (SCCPSCRC) of this module, which kind of mobile phone business is complete the 3rd layer of message of decoding A mouth mobile management layer be with judgement, can select to determine to carry out the MSC module of Business Processing then, and the SCCP that sends a message to chosen module sets up SCCP and connects towards connection process (SCCPSCOC).Although said system is supported the mode that signaling link separates with the land circuit configuration, but the inventive method is when selecting Service Processing Module, be that SCCP is connected on the MSC module that is based upon same call land circuit place (needing signaling link on this MSC module), thereby SCCP connection, A mouth, three functives of CC are configured on the same module.

Fig. 2 is the schematic diagram of present embodiment SCCP connection and signaling link separation method, and Fig. 3 is the flow chart of present embodiment method, may further comprise the steps:

The load of each this module of MSC module real-time assessment is also synchronous between each module with the result, wherein, the method that regularly detects CPU usage is used in the occupancy assessment of CPU, and the situation that takies of land circuit can obtain step 100 by the real-time configuring condition to land circuit in the database;

The signaling link of MSC modules A is received the business request information of handset call, decodes at the routing daemon of this module SCCP and judges the kind of mobile phone business, step 110;

Whether the load of judging this module also has surplus (have surplus to be meant and also have idle land circuit and CPU usage to be no more than the setting thresholding, as 70%) herein, if, execution in step 130a, otherwise execution in step 130b, step 120;

Determine that this module is that modules A is to handle this professional module, step 130a;

Be no more than the setting thresholding (as 70% from CPU usage, two thresholdings can be identical or different) module in, select the minimum module of land circuit occupancy, be defined as handling this professional module, if the CPU usage of other module has all surpassed thresholding, also select the minimum module of ground circuit usage.This is a kind of index based on the land circuit operating position, and CPU usage is the principle of assisting, step 130b;

In database, take an idle land circuit in advance for the chosen module configuration.The circuit that the preemption circuit can prevent a free time in database receive connection request message to real distribute land circuit during this period of time in quilt misapplied repeatedly step 140;

Comprise the source address reference of chosen module information for one of this call distribution.SCCP connection according to the agreement regulation is referenced as 3 bytes, present embodiment distribute source address with reference to the time, with its module No. of some bit representations in the 3rd byte, and " the source address reference " of MSC when sending out message is when BSC returns message, just as " destination address is with reference to " being dealt into MSC, step 150;

The SCCP that business request information is sent to chosen module (being assumed to module B) sets up SCCP and connects step 160 towards connection process;

A mouth process (is carried out mobile management in calling, it mainly is authentication to the user, prevent that the disabled user from inserting) and CC process (call out to control process) also all be based upon on the module B, and after the SETUP of call control layer call setup message, carry out land circuit and distribute (the allocated circuit message of A mouth).This distribution opportunity is the gsm protocol regulation, also has in the agreement certainly and early distributes the multiple implementation of distributing evening, step 170;

When the A mouth of any module received the subsequent message that BSC connects about this SCCP, the routing daemon of SCCP was according to the destination address reference in the SCCP layer message, and the SCCP that sends a message to module B handles towards connection process.The connection-oriented message of any SCCP that the A mouth sends to BSC can send step 180 on the signaling link of any this BSC;

(circuit blocks the administrative messag of the described land circuit that receives for the A mouth, separate and close, reset, circuit group congestion, separate and close, unequipped circuit etc.), SCCP sends to the A mouth of receiving module, determine module under this land circuit by the A mouth according to the data configuration in the database, forwards is handled to the A mouth of institute's determination module (being module B).Certainly the message of receiving at module B can not transmitted step 190 yet.

It should be noted that, though the present invention will connect SCCP on the module at the land circuit place that is based upon same call, but the method for selecting of Service Processing Module is not limited to method in the foregoing description according to each module load condition, for example, just judge according to ground circuit usage or CPU usage, also can reach basic effect, whether the load of perhaps not judging this module when selecting earlier also has surplus, also is feasible but the load of this module and other module is compared by same standard.

Claims

1, the call processing method in the big capacity base station controller BSC of a kind of multimode moving exchanging center MSC support system may further comprise the steps:

(a) load of each this module of MSC module real-time assessment;

(b) after the signaling link of MSC module is received the call business request message of coming from BSC, judge professional kind in the routing daemon decoding of the SCCP SCCP of this module;

(g) administrative messag of the described land circuit that receives for the A mouth, SCCP sends to the A mouth of receiving module earlier, determines module under this land circuit by the A mouth according to data configuration, and the A mouth that sends to corresponding module is then handled.

2, call processing method as claimed in claim 1 is characterized in that, the load of described step (a) is meant the situation that takies of CPU usage and land circuit, and the result is synchronized to each module.

3, call processing method as claimed in claim 2, it is characterized in that, when selecting Service Processing Module in the described step (c), the preferential selection module that described signaling link connected, when this module load does not have surplus, do not surpass the module of setting thresholding from CPU usage again, select the minimum module of ground circuit usage.