CN108989284A - A kind of service trigger method, storage medium and application server - Google Patents
A kind of service trigger method, storage medium and application server Download PDFInfo
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- CN108989284A CN108989284A CN201810580370.5A CN201810580370A CN108989284A CN 108989284 A CN108989284 A CN 108989284A CN 201810580370 A CN201810580370 A CN 201810580370A CN 108989284 A CN108989284 A CN 108989284A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/10—Architectures or entities
- H04L65/1045—Proxies, e.g. for session initiation protocol [SIP]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/10—Architectures or entities
- H04L65/1016—IP multimedia subsystem [IMS]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/10—Architectures or entities
- H04L65/1063—Application servers providing network services
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1001—Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers
- H04L67/1004—Server selection for load balancing
- H04L67/1008—Server selection for load balancing based on parameters of servers, e.g. available memory or workload
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/60—Scheduling or organising the servicing of application requests, e.g. requests for application data transmissions using the analysis and optimisation of the required network resources
- H04L67/63—Routing a service request depending on the request content or context
Abstract
The invention discloses a kind of service trigger method, storage medium and application servers, the described method includes: S-CSCF receives service request, and the corresponding AS server list of the service request is chosen in the service allocation list obtained in advance, wherein, the corresponding type of service of AS server that the AS server list includes is identical；The corresponding AS server of the service request is searched in the AS server list according to preset rules；When finding the AS server, the service request is sent to the AS server, to trigger the service request.The AS server for being used for identical services type is divided a service groups by the present invention, and S-CSCF can obtain the load condition of each AS server in identical services group in real time, and according to the AS server in the method choice service groups of the configuration of priority and load balancing, facilitate the AS server of the large-scale IMS network of operator's Dynamical Deployment.
Description
Technical field
The present invention relates to field of communication technology, in particular to a kind of service trigger method, storage medium and application service
Device.
Background technique
IMS(IP Multimedia Subsystem, IP multimedia subsystem) endpoint to register to IMS network when, service is exhaled
It is conversation control function S-CSCF(Serving Call Session Control Function) it can be from HSS(Home
Subscriber Server, home signature user server) downloading associated user subscription data business information in iFC
(Initial Filter Criteria, initial filter criteria).S-CSCF is according to calling party's in processing calling procedure
Ifc filtering rule search AS(Application Server, application server) server title, then according to AS server
Title routes calls to specified AS server.In the application of extensive IMS network, multiple S-CSCF are often disposed, together
When can also dispose multiple AS application servers to manage basic supplementary service, one is then faced with for identical services in this way
How a IMS user is assigned to the problem of which specific AS application server.
In order to solve the above method, the following two kinds method is generallyd use at present:
First method: specifying some specific AS server when IMS user opens an account, operator be then not easy dynamic increase or
Reduce the deployment of AS server；
Second method: the AS server of same type provides external application unified title, searches by dns server specific
AS server address, and the select permeability of the load sharing with DNS management AS server.But per call requires to access
Dns server, being bound to cause DNS becomes the performance bottleneck of system, if dns server paralysis will lead to the event of whole system
Barrier.
Thus the prior art could be improved and improve.
Summary of the invention
In view of the deficiencies in the prior art, the invention aims to provide a kind of service trigger method, storage medium and
Application server.
In order to solve the above-mentioned technical problem, the technical solution adopted in the present invention is as follows:
A kind of service trigger method comprising:
S-CSCF receives service request, and chooses the corresponding AS server of the service request in the service allocation list obtained in advance
List, wherein the corresponding type of service of AS server that the AS server list includes is identical；
The corresponding AS server of the service request is searched in the AS server list according to preset rules；
When finding the AS server, the service request is sent to the AS server, is asked with triggering the business
It asks.
In the service trigger method, the S-CSCF receives service request, and in the service allocation list obtained in advance
Include: before choosing the corresponding AS server list of the service request
When S-CSCF electrifying startup, pass through network management downloading service group allocation list, wherein the service groups allocation list includes at least one
A AS server list.
In the service trigger method, the S-CSCF receives service request, and in the service allocation list obtained in advance
The corresponding AS server list of the service request is chosen to specifically include:
S-CSCF receives service request, and corresponding using the initial filter criteria iFC screening service request obtained in advance
Business group name；
The AS of the corresponding service groups of the business group name is chosen in the service groups allocation list according to the business group name
Server list.
It is described to search the business in the AS server list according to preset rules in the service trigger method
Corresponding AS server is requested to specifically include:
The first AS server chained list of the first priority is read, and searches the service request in the first AS server chained list and corresponds to
AS server, wherein the priority for the AS server that the first AS server chained list includes is identical；
If not finding, the 2nd AS server chained list of the second priority is read, and search institute in the 2nd AS server chained list
State the corresponding AS server of service request, and so on searched until finding the AS server or all AS server chained lists
It finishes.
In the service trigger method, the first AS server chained list for reading the first priority, and in the first AS
Server chained list is searched the corresponding AS server of the service request and is specifically included:
The first AS server chained list of the first priority is read, and obtains in the AS server chained list first AS server
First load；
Judge whether first load reaches default load；
If reaching reservation load, the second load of second AS server in the AS server chained list is obtained, is circuited sequentially
It is finished up to finding the AS server or the first AS server chained list lookup.
It is described when finding the AS server in the service trigger method, the service request is sent to
The AS server, after triggering the service request further include:
S-CSCF obtains the third load of the AS server, and updates AS server list using the load.
In the service trigger method, the method also includes:
S-CSCF receives the synchronous current business group allocation list of network management, and by current business group allocation list and the service groups downloaded
Allocation list compares；
When the two is inconsistent, current business group allocation list is downloaded, and downloaded using current business group allocation list update
Service groups allocation list.
A kind of computer readable storage medium is stored with one or more program, one or more of programs
It can be executed by one or more processor, to realize the step in as above any service trigger method.
A kind of application server comprising: processor, memory and communication bus;Being stored on the memory can quilt
The computer-readable program that the processor executes；
The communication bus realizes the connection communication between processor and memory；
The processor realizes the step in as above any service trigger method when executing the computer-readable program.
The utility model has the advantages that compared with prior art, the present invention provides a kind of service trigger method, storage medium and applications
Server, which comprises S-CSCF receives service request, and chooses the business in the service allocation list obtained in advance and ask
Seek corresponding AS server list, wherein the corresponding type of service of AS server that the AS server list includes is identical；It presses
The corresponding AS server of the service request is searched in the AS server list according to preset rules；It is taken when finding the AS
When business device, the service request is sent to the AS server, to trigger the service request.The present invention will be used for the mutually same trade
The AS server of service type divides a service groups, and S-CSCF can obtain each AS server in identical services group in real time
Load condition, and according to the AS server in the method choice service groups of the configuration of priority and load balancing, facilitate operator
The AS server of the large-scale IMS network of Dynamical Deployment.
Detailed description of the invention
Fig. 1 is the flow chart of service trigger method preferred embodiment provided by the invention.
Fig. 2 is the flow chart that AS server list is searched in service trigger method provided by the invention.
Fig. 3 is the flow chart that AS server chained list is searched in service trigger method provided by the invention.
Fig. 4 is that S-CSCF calls the flow chart that the load of AS server updates in service trigger method provided by the invention.
Fig. 5 is that AS calls the flow chart that the load of S-CSCF server updates in service trigger method provided by the invention.
Fig. 6 is that AS calling receives the flow chart that the load of registration updates in service trigger method provided by the invention.
Fig. 7 is the structure principle chart of application server preferred embodiment provided by the invention.
Specific embodiment
The present invention provides a kind of service trigger method, storage medium and application server, to make the purpose of the present invention, skill
Art scheme and effect are clearer, clear, and the present invention is described in more detail as follows in conjunction with drawings and embodiments.It should manage
Solution, described herein specific examples are only used to explain the present invention, is not intended to limit the present invention.
Those skilled in the art of the present technique are appreciated that unless expressly stated, singular " one " used herein, " one
It is a ", " described " and "the" may also comprise plural form.It is to be further understood that being arranged used in specification of the invention
Diction " comprising " refer to that there are the feature, integer, step, operation, element and/or component, but it is not excluded that in the presence of or addition
Other one or more features, integer, step, operation, element, component and/or their group.It should be understood that when we claim member
Part is " connected " or when " coupled " to another element, it can be directly connected or coupled to other elements, or there may also be
Intermediary element.In addition, " connection " used herein or " coupling " may include being wirelessly connected or wirelessly coupling.It is used herein to arrange
Diction "and/or" includes one or more associated wholes for listing item or any cell and all combinations.
Those skilled in the art of the present technique are appreciated that unless otherwise defined, all terms used herein (including technology art
Language and scientific term), there is meaning identical with the general understanding of those of ordinary skill in fields of the present invention.Should also
Understand, those terms such as defined in the general dictionary, it should be understood that have in the context of the prior art
The consistent meaning of meaning, and unless idealization or meaning too formal otherwise will not be used by specific definitions as here
To explain.
With reference to the accompanying drawing, by the description of the embodiment, further explanation of the contents of the invention are made.
Fig. 1 is please referred to, Fig. 1 is the flow chart of the preferred embodiment of service trigger method provided by the invention.The method
Include:
S10, S-CSCF receive service request, and choose the corresponding AS clothes of the service request in the service allocation list obtained in advance
Business device list, wherein the corresponding type of service of AS server that the AS server list includes is identical.
Specifically, the service allocation list is used to store the table of AS server info.Storage in the service allocation list
There is the corresponding relationship of business group name, AS server list and the two.The business group name and the AS server list
It is corresponding, and the entitled AS server list of service groups include all AS servers formed service groups title.
The function that all AS servers that each service groups include have is identical, i.e., all AS servers that each service groups include are for handling
The type of service of business is identical.That is, all AS servers that its entitled corresponding service groups of the service groups include
Same name, there are mapping relations one by one between the business group name and type of service, can be determined according to type of service
Its corresponding business group name, and its corresponding AS server list can be searched according to the business group name, and then obtain
Get the AS server of the business for handling the type of service.In addition, the AS server list is configured with its corresponding industry
Title, priority, present load and the load threshold for all AS servers that business group includes, to be arranged by the AS server
Table can search all AS servers for handling the service request, the priority of each AS server, present load and negative
Carry threshold value.The AS server for handling the service request can be determined by the AS server list in this way.
In the present embodiment simultaneously, the service allocation list is network management data, is that S-CSCF downloads to obtain from network management.Phase
It answers, the S-CSCF receives service request, and chooses the corresponding AS of the service request in the service allocation list obtained in advance
When including: S-CSCF electrifying startup before server list, pass through network management downloading service group allocation list, wherein the service groups
Allocation list includes at least one AS server list.In addition, the service allocation list can be moved according to the configuration of AS server
State updates, so that can both increase or retrieve the AS server in each traffic packets in the non-stop-machine situation of S-CSCF.Phase
It answers, after S-CSCF electrifying startup, the S-CSCF can in real time or interval preset time obtains the current industry on network management
Business group allocation list, and update according to current business group allocation list the service groups allocation list of load.That is, the business
Requesting triggering method can also include:
S-CSCF receives the synchronous current business group allocation list of network management, and by current business group allocation list and the service groups downloaded
Allocation list compares；
When the two is inconsistent, current business group allocation list is downloaded, and downloaded using current business group allocation list update
Service groups allocation list.
Specifically, S-CSCF in the process of running, if increasing or decreasing the AS server in deployment service groups, can lead to
The corresponding AS server list of the service groups in the network management dynamic configuration function renewal service allocation list on S-CSCF is crossed, has been updated
Service allocation list, and when S-CSCF obtains service allocation list, updated current business configuration table is shown to S-CSCF, with
So that S-CSCF realizes Dynamical Deployment AS server in non-stop-machine situation.In the present embodiment, in order to reduce S-CSCF
Load, by network management carry out service allocation list update after, updated service allocation list is actively synchronized to S-CSCF so that
It obtains S-CSCF and updates the service allocation list downloaded.That is, network management is by updated industry after service allocation list updates
Business allocation list is synchronized to S-CSCF, so that S-CSCF is selected AS to provide business service by the method realized below, thus
Realize the function of Dynamical Deployment AS server.
In addition, S-CSCF can be according to iFC pairs of initial filter criteria obtained in advance when S-CSCF receives service request
Business is matched, with the corresponding purpose business group name of the determination service request.Correspondingly, the S-CSCF receives business
Request, and choose the corresponding AS server list of the service request in the service allocation list obtained in advance and specifically include:
S-CSCF receives service request, and corresponding using the initial filter criteria iFC screening service request obtained in advance
Business group name；
The AS of the corresponding service groups of the business group name is chosen in the service groups allocation list according to the business group name
Server list.
Specifically, the initial filter criteria iFC is that there are in the user contracting data of home signature user server HSS
A part, downloaded in user's registration for user distribution S-CSCF in, iFC according to define business triggering condition with
And purpose AS service groups, S-CSCF carries out iFC screening when processing is for service request, to determine the corresponding business of service request
Group name, then its corresponding AS server list is found according to the business group name in service allocation list, so that it is determined that
The AS server list.
S20, the corresponding AS server of the service request is searched in the AS server list according to preset rules.
It specifically, include several AS server chained lists, packet in each AS server chained list in the AS server list
Containing at least one AS server, and the priority for all AS servers for including in each AS server chained list is identical.It is described
Preset rules include two criterion, and the first criterion is to choose AS server chained list from high in the end according to preference, and the second criterion is
AS server is chosen according to the load of each AS server in AS server.Correspondingly, as shown in Fig. 2, described according to default rule
The corresponding AS server of the service request is then searched in the AS server list to specifically include:
S21, the first AS server chained list for reading the first priority, and the service request is searched in the first AS server chained list
Corresponding AS server, wherein the priority for the AS server that the first AS server chained list includes is identical；
If S22, not finding, the 2nd AS server chained list of the second priority is read, and look into the 2nd AS server chained list
Look for the corresponding AS server of the service request, and so on until find the AS server or all AS server chained lists
Lookup finishes；
If S23, the AS server is found, by the AS server feedback found to S-CSCF；
If S24, all AS server chained lists have been searched and do not found AS server yet, fail to S-CSCF feedback search.
Specifically, the first AS server chained list, the 2nd AS server chained list are to store in the AS server list
, each AS server chained list is arranged successively from high in the end according to priority, i.e. the priority of the first AS server chained list is high
In the priority of the 2nd AS server chained list.At least one AS server is stored in each AS server chained list, and each AS takes
The priority for the AS server for including in business device chained list is equal.In the present embodiment, the priority is pre-set, example
Such as, the entitled service1.ims.com of the corresponding service groups of AS server list comprising 3 AS servers, respectively
As1.ims.com, as2.ims.com and as3.ims.com, wherein the priority of as1.ims.com is 2,
The priority of as2.ims.com and as3.ims.com be 1, meanwhile, as1.ims.com, as2.ims.com and
The load threshold of as3.ims.com is 80.So, the as1.ims.com constitutes the first AS server chained list,
As2.ims.com and as3.ims.com constitutes the 2nd AS server chained list, wherein the priority of the first AS server chained list
It is 2, the priority of the 2nd AS server chained list is 1.That is, when searching AS server in AS server list, first
The as1.ims.com that the first AS server chained list includes is read, judges whether the as1.ims.com can handle the business
Request；When that cannot handle, then as2.ims.com and as3.ims.com that the 2nd AS server chained list includes are read, then divide
Do not judge whether as2.ims.com and as3.ims.com can handle the service request, and so on until find AS
Server or the AS server chained list are finished.
In the present embodiment simultaneously, when finding AS server, using the AS server as being used to handle the industry
The AS server of business request, the S-CSCF trigger the AS server.The AS server chained list, which is finished, to be indicated not look into
The AS server is found, if not finding AS server, illustrates that the AS server load configured in current business group is all super
It carries, S-CSCF is issued to network management and alerted, and facilitates whether operation maintenance personnel decision increases new AS server.
In addition, it is to be looked into according to the load of each AS server for foundation that the AS server chained list, which searches AS server,
It looks for.Correspondingly, as shown in figure 3, the first AS server chained list for reading the first priority, and in the first AS server chained list
The corresponding AS server of the service request is searched to specifically include:
S211, the first AS server chained list for reading the first priority, and obtain first AS clothes in the AS server chained list
First load of business device；
S212, judge whether first load reaches default load；
If S213, reaching reservation load, the second load of second AS server in the AS server chained list is obtained, successively
Circulation is finished up to finding the AS server or the first AS server chained list lookup；
If S214, the AS server is searched, by the AS server feedback found to S-CSCF；
It completes not finding AS server if AS server described in S24, the first AS server chained list is searched, not searched to feedback
To AS server, and read the 2nd AS server chained list.
Specifically, if reaching reservation load illustrates that first AS server cannot respond to the service request,
When may determine that first AS server at this time whether to be the last one AS not being the last one, second AS service is obtained
Second load of device.If i.e. described reach reservation load, the of second AS server is obtained in the AS server chained list
If two loads, which are specifically as follows, reaches default load, judge whether first AS server is the last one server,
When it is not the last one server, the second load of second AS server in the AS server chained list is obtained, and will
Second load is compared with reservation load；And so on until finding AS server obtains the first AS server chained list
Lookup finishes.
S30, when finding the AS server, the service request is sent to the AS server, to trigger
State service request.
Specifically, if finding the AS server, the AS server is fed back to S-CSCF, so that S-CSCF is triggered
The service request executes the service request by the AS server.
In the present embodiment simultaneously, as shown in Figure 4, Figure 5 and Figure 6, the S-CSCF sends service request, AS to S- to AS
When CSCF transmission service request or AS receive registration request, the AS server can obtain the load value at current time,
And load value is fed back into S-CSCF so that in S-CSCF real-time update service allocation list each AS server load.In addition,
When AS server discharges the business executed, AS server can also obtain the load value at current time, and load value is fed back
To S-CSCF so that in S-CSCF real-time update service allocation list each AS server load.Guarantee service allocation list in this way
The real-time of the load of each AS server of middle storage.In practical applications, S-CSCF gets the load of AS server in real time,
AS load value is obtained using the method for expanding sip message transmitting information in real time.According to the SIP grammer of 25.1 sections of RFC3261
Definition, sip message VIA head via-extension partially can customized extension parameter, using token EQUAL
The format of quoted-string, token are defined as " AsLoad ", and quoted-string adds two digits to indicate to exhale with C letter
It is the percentage load of class, or adds two digits to indicate the percentage load of third-party registration with R letter, for example, AS is current
Call load is 45%, can be indicated with " AsLoad=C45 ".The Invite session of one SIP has multiple interaction messages, in order to
Avoiding all AS from being sent to the message of S-CSCF all includes that AS load information causes the unnecessary performance loss of S-CSCF, Ke Yiding
First (in addition to 100 try message) response message of adopted AS is with the last one to the VIA of the S-CSCF sip request message sent
Head carries AS load information.AS load information is carried if it is the 200 OK response messages of Bye request message or Bye, indicates to work as
Load capacity after preceding calling release.
Correspondingly, the service trigger method further include:
S-CSCF obtains the third load of the AS server, and updates AS server list using the load.
Specifically, the third load that the S-CSCF obtains the AS server is divided into three kinds of situations, respectively S-CSCF
Service request, AS, which are sent, to AS receives registration request to S-CSCF transmission service request or AS.That is, working as the S-
CSCF sends service request to AS, AS receives either case in registration request to S-CSCF transmission service request or AS and occurs
When, AS can be by the load feedback at its current time to S-CSCF.
Based on above-mentioned service trigger method, the present invention also provides a kind of computer readable storage mediums, are stored with one
A or multiple programs, one or more of programs can be executed by one or more processor, as above any to realize
Step in service trigger method described in embodiment.
Based on above-mentioned service trigger method, the present invention also provides a kind of application servers, as shown in Figure 7 comprising extremely
A few processor (processor) 20；Display screen 21；And memory (memory) 22, it can also include communication interface
(Communications Interface) 23 and bus 24.Wherein, processor 20, display screen 21, memory 22 and communication connect
Mouth 23 can complete mutual communication by bus 24.Display screen 21 is set as preset user in display initial setting mode
Guide interface.Communication interface 23 can transmit information.Processor 20 can call the logical order in memory 22, on executing
State the method in embodiment.
In addition, the logical order in above-mentioned memory 22 can be realized and as only by way of SFU software functional unit
Vertical product when selling or using, can store in a computer readable storage medium.
Memory 22 is used as a kind of computer readable storage medium, and it is executable to may be configured as storage software program, computer
Program, such as the corresponding program instruction of method or module in the embodiment of the present disclosure.Processor 30 is stored in memory by operation
Software program, instruction or module in 22, thereby executing functional application and data processing, i.e. side in realization above-described embodiment
Method.
Memory 22 may include storing program area and storage data area, wherein storing program area can storage program area, extremely
Application program needed for a few function；Storage data area, which can be stored, uses created data etc. according to terminal device.This
Outside, memory 22 may include high-speed random access memory, can also include nonvolatile memory.For example, USB flash disk, movement
Hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory,
RAM), a variety of media that can store program code such as magnetic or disk, are also possible to transitory memory medium.
In addition, the detailed process that a plurality of instruction processing unit in above-mentioned storage medium and application server is loaded and executed
It has been described in detail, has just no longer stated one by one herein in the above-mentioned methods.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (9)
1. a kind of service trigger method, characterized in that it comprises:
S-CSCF receives service request, and chooses the corresponding AS server of the service request in the service allocation list obtained in advance
List, wherein the corresponding type of service of AS server that the AS server list includes is identical；
The corresponding AS server of the service request is searched in the AS server list according to preset rules；
When finding the AS server, the service request is sent to the AS server, is asked with triggering the business
It asks.
2. service trigger method according to claim 1, which is characterized in that the S-CSCF receives service request, and pre-
The service allocation list first obtained chooses the corresponding AS server list of the service request
When S-CSCF electrifying startup, pass through network management downloading service group allocation list, wherein the service groups allocation list includes at least one
A AS server list.
3. service trigger method according to claim 1 or claim 2, which is characterized in that the S-CSCF reception service request, and
The service allocation list obtained in advance is chosen the corresponding AS server list of the service request and is specifically included:
S-CSCF receives service request, and corresponding using the initial filter criteria iFC screening service request obtained in advance
Business group name；
The AS of the corresponding service groups of the business group name is chosen in the service groups allocation list according to the business group name
Server list.
4. service trigger method according to claim 1, which is characterized in that it is described according to preset rules in the AS server
The corresponding AS server of the service request is searched in list to specifically include:
The first AS server chained list of the first priority is read, and searches the service request in the first AS server chained list and corresponds to
AS server, wherein the priority for the AS server that the first AS server chained list includes is identical；
If not finding, the 2nd AS server chained list of the second priority is read, and search institute in the 2nd AS server chained list
State the corresponding AS server of service request, and so on searched until finding the AS server or all AS server chained lists
It finishes.
5. service trigger method according to claim 4, which is characterized in that the first AS service for reading the first priority
Device chained list, and search the corresponding AS server of the service request in the first AS server chained list and specifically include:
The first AS server chained list of the first priority is read, and obtains in the AS server chained list first AS server
First load；
Judge whether first load reaches default load；
If reaching reservation load, the second load of second AS server in the AS server chained list is obtained, is circuited sequentially
It is finished up to finding the AS server or the first AS server chained list lookup.
6. service trigger method according to claim 1, which is characterized in that it is described when finding the AS server, it will
The service request is sent to the AS server, after triggering the service request further include:
S-CSCF obtains the third load of the AS server, and updates AS server list using the load.
7. service trigger method according to claim 1, which is characterized in that the method also includes:
S-CSCF receives the synchronous current business group allocation list of network management, and by current business group allocation list and the service groups downloaded
Allocation list compares；
When the two is inconsistent, current business group allocation list is downloaded, and downloaded using current business group allocation list update
Service groups allocation list.
8. a kind of computer readable storage medium, which is characterized in that the computer-readable recording medium storage have one or
Multiple programs, one or more of programs can be executed by one or more processor, to realize such as claim 1~8
Step in service trigger method described in any one.
9. a kind of application server characterized by comprising processor, memory and communication bus;It is stored on the memory
There is the computer-readable program that can be executed by the processor；
The communication bus realizes the connection communication between processor and memory；
The processor realizes the business triggering as described in claim 1-8 any one when executing the computer-readable program
Step in method.
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