CN100466572C - Equal access and initial route filtering method for packet network - Google Patents

Equal access and initial route filtering method for packet network Download PDF

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Publication number
CN100466572C
CN100466572C CNB200610033975XA CN200610033975A CN100466572C CN 100466572 C CN100466572 C CN 100466572C CN B200610033975X A CNB200610033975X A CN B200610033975XA CN 200610033975 A CN200610033975 A CN 200610033975A CN 100466572 C CN100466572 C CN 100466572C
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label
user
route
tactful
service
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CN101026515A (en
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郑波
施有铸
黄世碧
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to CNB200610033975XA priority Critical patent/CN100466572C/en
Priority to PCT/CN2007/000411 priority patent/WO2007095836A1/en
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    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H04W8/04—Registration at HLR or HSS [Home Subscriber Server]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/12—WLAN [Wireless Local Area Networks]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/16—Gateway arrangements

Abstract

Being in use for packet telecom network by using session initialization protocol as call control signaling of core network, the method includes following steps: storing user's coequal access signing data in first logic net element; based on user's coequal access signing data, the first logic net element obtains user's route strategy; when receiving message of user call request, the first logic net element applies user's route strategy; a second logic net element accomplishes route selection function of user signed operation manager. In packet network, the method makes router provide coequal access for terminal users. Signing contract for coequal access, user own can selects service provider. Thus, basic service characters of traditional telecom network keep good succession, and guarantee fairness of competition.

Description

A kind of in Packet Based Network the method for equal access and initial route filtering
Technical field
The present invention relates to the method that inserts in a kind of Packet Based Network, the method for equal access in particular a kind of Packet Based Network, promptly a kind of method by the optionally connected carrier network of going into of user.
The present invention also relates to the initial route in the equal access and the method for filtration in a kind of Packet Based Network simultaneously.
Background technology
Equal access is the notion that proposes under the environment of network operator more than, its essence is one can be under the situation of knowing the inside story by user's (or being called the consumer) according to oneself wish, the selection different operators comes to provide service for it.The user is clearly wanting under the purpose of connecting number situation, can select a best route that inserts according to factors such as destination Mobile Station International ISDN Number, communication quality requirement, call duration time, prices.
In traditional access way, telecommunication control department can distribute a Carrier Identification Code (CIC for each network operator, Carry Identify Code is a Carrier Identification Code), as China distributed to originally China Telecom 190, CHINAUNICOM 193 etc. be exactly the identification code of operator.When the user using certain professional during as trunk call, can be chosen as the operator that it provides the trunk call business according to the personal inclination.
Usually the user can select toll network by the mode of dialing, when wishing to use the long-distance network of appointment as the user, can call out (perhaps on the terminal that the user uses, do simple processing, CIC is inserted in specific calling before number) by the mode of " CIC+ trunk prefix+trunk code+local number ".At this moment, end office (EO) during CIC, will send to calling corresponding carrier network in analysis user is dialled the number, and thisly selects the mode of operator to be commonly referred to as Call-by-Call by subscriber dialing.
Another kind of commonplace way is that the equal access business is provided in network, the user can be to the signatory different operators of different business, finish the selection of operator by the signatory wish of network based user, thisly preset the signatory mode of operator of selecting of user by network and be commonly referred to as Preselection (selecting in advance).
Equal access described in the present invention, if there is not specified otherwise, what refer to is exactly the equal access of Preselection mode.In existing fixed network, equal access is that the expansion user property that passes through is realized.To use different network (or being referred to as operator) in order describing with recording user under different business, to increase the matrix table of a m*n, wherein, network is shown in the m tabulation, and business is shown in the n tabulation.Mostly be most n kind business network selection power is provided, each business provides the possibility of selecting m kind network.Like this, the signatory operator of the miscellaneous service of switching equipment recording user data.When business took place the user, switching equipment was analyzed service attribute, and selected corresponding signatory operator according to service attribute in matrix table, and selected route according to the signatory operator of correspondence, and service request is sent to corresponding carrier network.
The difference of existing equal access realization and fixed network is exactly the transmission that needs the signatory operator of MAP supporting business data among the mobile network, and needs MSC (home domain and visit territory) to support to select according to service contracting operator the function of route.
At present, continuous maturation along with group technology, towards the broadband telecommunication net development based on packet switching, wherein, using SIP is one of current technology trends as the call control signalling of grouping telecommunications core network based on Circuit-switched conventional telecommunication network.How supporting equal access in packet network, make the user can freely select service provider, guarantee the fairness of competition, is urgent problem in the current group network.
Summary of the invention
The object of the present invention is to provide a kind of method of equal access in Packet Based Network, in the grouping telecommunications network of SIP, realize the equal access of network as the call control signalling of core net.
Technical scheme of the present invention comprises:
A kind of method of equal access in Packet Based Network, it is used for the conversation initialized protocol is the grouping telecommunications network of core net call control signalling, comprises step:
Storage user's equal access subscription data in A, one first logical ne in network, this first logical ne obtains user's routing policy according to user's equal access subscription data;
B, described first logical ne, when receiving message of user call request, the routing policy of user application;
C, one second logical ne are finished the routing function to the signatory operator of user.
Described method, wherein, described first logical ne is AGCF unit or service call conversation control function unit or equal access server or Breakout Gateway Control Function unit or Interconnection Border Control Function unit.
Described method, wherein, described second logical ne is service call conversation control function unit or Breakout Gateway Control Function unit or Interconnection Border Control Function unit.
Described method, wherein, when described first logical ne is the AGCF unit, second logical ne is the service call conversation control function unit, and described AGCF unit obtains signatory operator sign according to the called number of user's equal access subscription data and calling; The routing policy of described user application is: do the called number conversion, increase operator's sign as prefix before called number, and request message is sent to the service call conversation control function unit.
Described method, wherein, when first logical ne was the service call conversation control function unit, described service call conversation control function unit was second logical ne simultaneously, and the routing policy of described user application is for carrying out an initial routing rule.
Described method, wherein, when first logical ne was the equal access server, described second logical ne was the service call conversation control function unit; Described equal access server obtains signatory operator address according to the called party identity sign of user's equal access subscription data and calling, and the routing policy of described user application is: increase signatory operator address in request message Route header field, perhaps the URL(uniform resource locator) of call by variable increases operator's sign as prefix; And request message sent to described service call conversation control function unit.
Described method, wherein, when first logical ne is the Breakout Gateway Control Function unit, described Breakout Gateway Control Function unit is second logical ne simultaneously, described Breakout Gateway Control Function unit obtains signatory operator Breakout Gateway Control Function element address according to the called party identity sign of user's equal access subscription data and calling, and the routing policy of described user application is: the Breakout Gateway Control Function unit that request message is sent to signatory carrier network.
Described method, wherein, when first logical ne is the Interconnection Border Control Function unit, described Interconnection Border Control Function unit is second logical ne simultaneously, described Interconnection Border Control Function unit obtains signatory operator Interconnection Border Control Function element address according to the called party identity sign of user's equal access subscription data and calling, and the routing policy of described user application is: the Interconnection Border Control Function unit that request message is sent to signatory carrier network.
Described method, wherein, described initial routing rule is encoded with extend markup language, send to the service call conversation control function unit of serving into the user by home subscriber server, described service call conversation control function unit is carried out this initial routing rule and is finished tactful route when the user makes a call conversation request.
Described method, wherein, described initial routing rule comprises user's equal access subscription data, and comprises:
In root element, comprise privately owned identification (RFID) tag and routing configuration label;
In privately owned identification (RFID) tag, provide the privately owned identify label of user;
In the routing configuration label, comprise public identify label label of user and route filtering rule label; In the public identify label label of user, provide the unified resource sign and/or the phone URL(uniform resource locator) of user conversation initializtion protocol; In route filtering rule label, comprise trigger point label and tactful routing iinformation label; In the label of trigger point, provide service point triggers relation and service point triggers and describe; In tactful routing iinformation label, provide the tactful route that the coupling service point triggers is described condition; In the service point triggers label, comprise environment description label, service point triggers group label and service point triggers matching condition.
Described method wherein, in the label of described trigger point, adopts the normal state expression formula to describe each service point triggers, and described service point triggers matching condition comprises:
Request unified resource identification (RFID) tag is used to identify this request resource pointed;
Conversation initialized protocol method label is used to represent the type of this request;
The conversation initialization protocol message head is used to comprise the information relevant with this request;
The session scenario label is used to provide three probable values of session, comprises that conversation start, session termination, session stop unregistered;
The conversation description label is used to define the service point triggers at any Session Description Protocol field contents in the conversation initialized protocol method body.
Described method wherein, when not providing the trigger point, represents that initial routing rule wishes unconditionally to be routed to assigned address.
Described method wherein, in the label of described trigger point, can adopt to connect normal state expression formula (Conjunctive Normal Form) and separate normal state expression formula (Disjunctive Normal Form) association service point trigger.
Described method, wherein, when adopt connecting normal state expression formula association service point trigger, use earlier or (Or) computing connect interior on the same group different matching conditions, re-use the matching condition that is connected with (And) computing not on the same group.
Described method wherein, when adopt separating normal state expression formula association service point trigger, is used earlier and different matching conditions in (And) computing connects on the same group, back use or (Or) computing connection on the same group matching condition not.
Described method wherein, in tactful routing iinformation label, provides the tactful routing iinformation that the coupling service point triggers is described condition.Described tactful routing iinformation can comprise a jumping or the multi-hop that tactful route need be passed through.
Described method, wherein, described service call conversation control function unit is behind match triggers point, and the step of the tactful route that provides in the implementation strategy routing iinformation label comprises: the call session request message is sent to next jumping that provides in the tactful routing tag.
Described method, wherein, described service call conversation control function unit is behind match triggers point, and the step of the tactful route that provides in the implementation strategy routing iinformation label comprises: with jumping or the multi-hop address information is put into the Route header field of call request message of comprising in the tactful routing iinformation that tactful route need pass through.
Described method, wherein, when having initial filter criteria and initial routing rule simultaneously, initial filter criteria is preferentially carried out in described service call conversation control function unit, carries out initial routing rule again.
Described method, wherein, also comprise, if in call request message, comprised the Route header field, with jumping or the address information of multi-hop is put into the top or the bottom of the Route header field of call request message of comprising in the tactful routing iinformation that tactful route need pass through.
Described method wherein, after described home subscriber server receives the server-assignment request command of service call conversation control function unit, is used server-assignment to reply and is sent initial routing rule to the service call conversation control function unit.
Described method wherein, after user's equal access subscription data that described home subscriber server is preserved upgrades, uses the propelling movement configuring request to upgrade initial routing rule to described service call conversation control function unit.
A kind of method of initial route filtering, it is encoded with extend markup language, is used for the equal access subscription data of storage user in one first logical ne of network, and obtains user's routing policy thus; Finish routing function by one second logical ne to the signatory operator of user;
At described first logical ne is the service call conversation control function unit, when described service call conversation control function unit is second logical ne simultaneously, described initial routing rule sends to the service call conversation control function of serving into the user by home subscriber server, and described service call conversation control function is carried out to finish tactful route when the user makes a call conversation request.
Described method, wherein, described initial routing rule comprises user's equal access subscription data, and comprises:
In root element, comprise privately owned identification (RFID) tag and routing configuration label;
Described privately owned identification (RFID) tag is used to provide the privately owned identify label of user;
Described routing configuration label comprises public identify label label of user and route filtering rule label, and the public identify label label of described user is used to provide the unified resource sign and/or the phone URL(uniform resource locator) of user conversation initializtion protocol; Described route filtering rule label comprises trigger point label and tactful routing iinformation label; Described trigger point label is used to provide the service point triggers relation and service point triggers is described; Described tactful routing iinformation label is used to provide the tactful route that the coupling service point triggers is described condition; In the service point triggers label, comprise environment description label, service point triggers group label and service point triggers matching condition.
Described method wherein, in the label of described trigger point, adopts the normal state expression formula to describe each service point triggers, and described service point triggers matching condition comprises:
Request unified resource identification (RFID) tag is used to identify this request resource pointed;
Conversation initialized protocol method label is used to represent the type of this request;
The conversation initialization protocol message head is used to comprise the information relevant with this request;
The session scenario label is used to provide three probable values of session, comprises that conversation start, session termination, session stop unregistered;
The conversation description label is used to define the service point triggers at any Session Description Protocol field contents in the conversation initialized protocol method body.
Described method, wherein, when not providing the trigger point, expression unconditionally is routed to assigned address.
Described method wherein, in the label of described trigger point, can adopt to connect normal state expression formula (Conjunctive Normal Form) and separate normal state expression formula (Disjunctive Normal Form) association service point trigger.
Described method wherein, when adopt connecting normal state expression formula association service point trigger, is used earlier or (Or) different matching conditions in computing connects on the same group, and the back use is connected not matching condition on the same group with (And) computing.
Described method wherein, when adopt separating normal state expression formula association service point trigger, is used earlier and different matching conditions in (And) computing connects on the same group, back use or (Or) computing connection on the same group matching condition not.
Described method wherein, in tactful routing iinformation label, provides the tactful routing iinformation that the coupling service point triggers is described condition, and described tactful routing iinformation comprises a jumping or the multi-hop that tactful route need be passed through.
Described method, wherein, described service call conversation control function unit is behind match triggers point, and the method for the tactful route that provides in the implementation strategy routing iinformation label comprises: the call session request message is sent to next jumping that provides in the tactful routing tag.
Described method, wherein, described service call conversation control function unit is behind match triggers point, and the method for the tactful route that provides in the implementation strategy routing iinformation label comprises: with jumping or the multi-hop address information is put into the Route header field of call request message of comprising in the tactful routing iinformation that tactful route need pass through.
Described method, wherein, when having initial filter criteria and initial routing rule simultaneously, described service call conversation control function unit is carried out initial filter criteria earlier, carries out initial routing rule again.
Described method, wherein, initial routing rule is being carried out in described service call conversation control function unit, with jumping or multi-hop when putting into the Route header field of call request message of comprising in the tactful routing iinformation that tactful route need pass through, if in call request message, comprised the Route header field, with jumping or the address information of multi-hop is put into the top or the bottom of the Route header field of call request message of comprising in the tactful routing iinformation that tactful route need pass through.
Described method wherein, after described home subscriber server receives the server-assignment request command of service call conversation control function, is used server-assignment to reply and is sent initial routing rule to service call conversation control function.
Described method wherein, after user's equal access subscription data that described home subscriber server is preserved upgrades, uses the propelling movement configuring request to upgrade initial routing rule to described service call conversation control function
The method of a kind of equal access in Packet Based Network provided by the present invention, realized that in packet network the terminal use selects equal access, can independently select service provider,, guarantee the fairness of competition simultaneously the good inheritance that has of the basic service feature in the conventional telecommunications net.
The present invention provide simultaneously a kind of in Packet Based Network the method for the initial route filtering of equal access, use this rule to make S-CSCF finish tactful route according to user contracting data.
Description of drawings
Fig. 1 is the cellular logic structural representation of packet-based core networks of the present invention;
Fig. 2 is one of signalling route path schematic diagram of the inventive method;
Fig. 3 be the inventive method signalling route path schematic diagram two;
Fig. 4 be the inventive method signalling route path schematic diagram three;
Fig. 5 be the inventive method signalling route path schematic diagram four;
Fig. 6 be the inventive method signalling route path schematic diagram five.
Embodiment
Below in conjunction with accompanying drawing, will be described in more detail each preferred embodiment of the present invention.
The method of equal access in Packet Based Network of the present invention, with SIP (Session InitiationProtocol, conversation initialized protocol) as call control signalling, the cellular logic structure of its packet-based core networks as shown in Figure 1, this figure is based on the NGN Organization Chart of ETSI subordinate's TISPAN definition.
Wherein, the network insertion unit inserts packet-based core networks with terminal and functions such as authentication registration authentication is provided, and the E1 interface between network insertion unit and the S-CSCF (Serving-CSCF, serving CSCF) is SIP.In the NGN framework of TISPAN (Telecommunications and Internet Converged Services andProtocols for Advanced Networking) definition, the network insertion unit is P-CSCF (Proxy-Call Session Control Function, Proxy Call Session Control Function) inserts sip terminal, also can be AGCF (Access Gateway Control Function, AGCF), insert conventional P OTS terminal and ISDN terminal.
The access server AS of one equal access provides user's equal access subscription data, with these routing policy data that provide the user to select operator; And S-CSCF, BGCF (Breakout GatewayControl Function, Breakout Gateway Control Function), IBCF (Interconnection Border ControlFunction, Interconnection Border Control Function), MGCF (Media Gateway Control Function, MGCF) function and interface are described and are seen also the TISPAN related definition, do not repeat them here.
The present invention in the grouping telecommunications network of SIP as the call control signalling of core net, terminal use's signing service operator.When network uses corresponding business the terminal use, service request is sent to corresponding carrier network.Specifically, certain first logical ne A has stored user's equal access subscription data in the network, this network element A obtains user's routing policy according to user's equal access subscription data, finishes routing function to the signatory operator of user by certain second logical ne B again.
The network element A of the inventive method can be AGCF (network insertion unit, Access GatewayControl Function, AGCF) or S-CSCF or equal access AS or BGCF or IBCF; Network element B can be S-CSCF or BGCF or IBCF.When network element A was S-CSCF or BGCF or IBCF, network element A and network element B were same network elements.
When network element A is AGCF or equal access AS, after AGCF or equal access AS obtain user's routing policy according to user's equal access subscription data, need in call signaling such as SIPINVITE message, embody the routing policy that the user selects signatory operator, afterwards to network element B carries out Route Selection according to this routing policy, for example:
In call signaling, carry the new destination address of the signatory operator of indication, pulling out the destination address that cries as the user is 0-755-6540808, it is CHINAUNICOM that the user will be chosen as its operator that long-distance service is provided, then call out through behind AGCF or the equal access AS, the new destination address that carries in the call signaling that sends becomes 193-755-6540808.
In call signaling, directly carry arrive signatory operator the network element address of process, make calling arrive signatory operator by the routed path of appointment, as call out through behind the equal access AS, directly carry the address of the signatory entrance network element IBCF of operator in call signaling that sends such as the SIP INVITE by the Route header field.
When user's equal access subscription data was on AGCF or equal access AS or BGCF or IBCF, this subscription data can be used as a kind of service application data and stores and manage; And when this subscription data is on S-CSCF, S-CSCF is irrelevant with service application in standard definition, can not store and manage as a kind of service application data, can adopt the signatory mechanism of a kind of iFC of similar current standard definition this moment on the S-CSCF, the equal access subscription data is stored and managed in HSS (Home Subscriber Server, home subscriber server) as a kind of user's route subscription data of expansion.
What the iFC subscription data of current standard definition showed is the initial filter criteria of user's business triggering, in the iFC subscription data, set a series of filtering rule and corresponding AS address, this filtering rule is from the sip message content, S-CSCF is by the coupling to this filtering rule, obtain providing the address of professional AS, similarly, can expand a kind of initial routing rule (Initial Route Criteria, hereinafter to be referred as iRC), in the iRC subscription data, set a series of filtering rule and corresponding routing address, the expression-form of this filtering rule can same iFC (Initial Filter Criteria, initial filtering rule) in full accord, and also from the sip message content, S-CSCF is by to the coupling of this filtering rule, obtain the next one or several backs to network element address.
IRC is the same with iFC to be stored and manages in HSS, and user S-CSCF when registration downloads from HSS and obtains, and when the iRC Data Update on the HSS, HSS initiatively upgrades to S-CSCF.
IRC uses XML (extend markup language) coding, comprising:
In root element, comprise privately owned identification (RFID) tag and routing configuration label; In privately owned identification (RFID) tag, provide the privately owned identify label of user; In the routing configuration label, comprise public identify label label of user and route filtering rule label; In the public identify label label of user, provide the unified resource sign and/or the phone URL(uniform resource locator) of user conversation initializtion protocol; In route filtering rule label, comprise trigger point label and tactful routing iinformation label; In the label of trigger point, provide service point triggers relation and service point triggers and describe; In tactful routing iinformation label, provide the tactful route that the coupling service point triggers is described condition; In the service point triggers label, comprise environment description label, service point triggers group label and service point triggers matching condition.
Wherein, in the label of trigger point, the service point triggers matching condition comprises:
Request unified resource identification (RFID) tag is used to identify this request resource pointed;
Conversation initialized protocol method label is used to represent the type of this request;
The conversation initialization protocol message head is used to comprise the information relevant with this request;
The session scenario label is used to provide three probable values of session, comprises that conversation start, session termination, session stop unregistered;
The conversation description label is used to define the service point triggers at any Session Description Protocol field contents in the conversation initialized protocol method body.
When not providing the trigger point, represent that initial routing rule wishes unconditionally to be routed to assigned address.
In the label of trigger point, adopt the normal state expression formula to describe each service point triggers.Can adopt and connect normal state expression formula (Conjunctive Normal Form) and separate normal state expression formula (DisjunctiveNormal Form) association service point trigger.When adopt connecting normal state expression formula association service point trigger, to use earlier or (Or) different matching conditions in computing connects on the same group, the back use is connected not matching condition on the same group with (And) computing.When adopt separating normal state expression formula association service point trigger, use and different matching conditions in (And) computing connects on the same group back use or (Or) computing connection on the same group matching condition not earlier.
In tactful routing iinformation label, provide the tactful routing iinformation that the coupling service point triggers is described condition, described tactful routing iinformation comprises a jumping or the multi-hop that tactful route need be passed through.
Provide specific embodiment below, as, user (SIP URI:abcd@2example.com, the tel URL:+861066668888) equal access of contracting, when calling out domain name when being the user of domain.com, maybe when calling out 0755 *The user time, the long distance service of using domain name to provide as long.com operator, wherein URL is Initial Filter Criteria, initial filtering rule.And URI is a Uniform resourceidentifier unified resource sign.
It is as follows to use Boolean expression to describe example:
Method＝”INVITE”AND(Request-URI＝”.*@domain.com.*”)
Method＝”INVITE”AND(Request-URI＝”＾(0755).*””)
Use XML to describe iRC, as follows:
＜!-use to connect normal state expression formula CNF description--
<？xml?version＝”1.0”encoding＝”UTF-8”？>
<testDatatype?xmlns:xsi＝”http://www.w3.org/2001/XMLSchema-instance”
xsi:noNamespaceSchemaLocation＝”D:\CxDataType.xsd”>
<IMSSubscription>
<PrivateID>IMPI1@homedomain.com</PrivateID>
<RouteProfile>
<PublicIdentity>
<Identity>sip:abcd@example.com</Identity>
</PublicIdentity>
<PublicIdentity>
<Identity>tel:+861066668888</Identity>
</PublicIdentity>
<InitialRouteCriteria>
<TriggerPoint>
<ConditionTypeCNF>1</ConditionTypeCNF>
<SPT>
<ConditionNegated>0</ConditionNegated>
<Group>0</Group>
<Method>INVITE</Method>
</SPT>
<SPT>
<ConditionNegated>0</ConditionNegated>
<Group>1</Group>
<RequestURI>”.*@domain.com.*”</RequestURI>
</SPT>
<SPT>
<ConditionNegated>0</ConditionNegated>
<Group>1</Group>
<RequestURI>”＾(0755).*”</RequestURI>
</SPT>
</TriggerPoint>
<NextHops>
<HopName>sip:IBCF@long.com</HopName>
<DefaultHandling>1</DefaultHandling>
</NextHops>
</InitialRouteCriteria>
</RouteProfile>
</IMS?Subscription>
</testDatatype>
Wherein, label＜PrivateID〉provide the privately owned ID of user, label＜RouteProfile〉in the public identify label＜PublicIdentity of user can be described and route filtering rule＜InitialRouteCriteria, at label＜PublicIdentity〉in, user SIP URI and tel URL can be provided.At label＜InitialRouteCriteria〉in, provide current route filtering rule trigger point＜TriggerPoint〉and mate after need the route＜NextHops of process, the route that needs process after the triggering can be some entities, also can be a plurality of entities, use label＜HopName provide the address of entity.And in the trigger point, can adopt the normal state expression formula to describe each service point triggers (SPT), last example be adopt to connect the normal state expression formula (Conjunctive Normal Form, CNF), use and to connect each＜Group 〉, each＜Group〉adopt the or connection between interior the SPT.When＜ConditionNegated〉when being 1, represent that current SPT gets " NOT ".＜SPT〉in, what can mate comprises:
Request URI (label＜RequestURI 〉), identify this request resource pointed;
SIP method (label＜Method 〉) is represented the type of this request;
The sip message head (label＜SIPHeader 〉), comprise the information relevant with this request.Wherein, can use label＜Header〉the describing message head, use＜Content〉a describing message content.
＜Content〉grammer is described and iFC similar:
A. " Joe ": the strict matched character string of message header " Joe " that expression provides.
B. " ^ (Jo) .* ": the message header that expression provides uses character string " Jo " beginning.
C. " .*Jo.* ": comprise substring " Jo " at an arbitrary position in the message header that expression provides.
Session scenario (label＜SessionCase 〉) provides three probable values of session, enumerates as follows:
Originating=0, the expression conversation start
Terminating=1, the expression session stops
Terminating_Unregistered=2, the expression session stops unregistered
Conversation description (label＜SessionDescription 〉), definition is at the service point triggers of any SDP field contents in the SIP method body.Grammer and above-mentioned＜Content〉grammer is consistent.
When not providing the trigger point, expression iRC wishes unconditionally to be routed to assigned address.In the last example, can adopt equally separate the normal state expression formula (Disjunctive Normal Form DNF) expresses, and example is as follows:
＜!-use and separate normal state expression formula DNF description--
<？xml?version＝”1.0”encoding＝”UTF-8”？>
<testDatatype?xmlns:xsi＝”http://www.w3.org/2001/XMLSchema-instance”
xsi:noNamespaceSchemaLocation＝”D:\CxDataType.xsd”>
<IMSSubscription>
<PrivateID>IMPI1@homedomain.com</PrivateID>
<RouteProfile>
<PublicIdentity>
<Identity>sip:abcd@example.com</Identity>
</PublicIdentity>
<PublicIdentity>
<Identity>tel:+861066668888</Identity>
</PublicIdentity>
<InitialRouteCriteria>
<TriggerPoint>
<ConditionTypeCNF>0</ConditionTypeCNF>
<SPT>
<ConditionNegated>0</ConditionNegated>
<Group>0</Group>
<Method>INVITE</Method>
</SPT>
<SPT>
<ConditionNegated>0</ConditionNegated>
<Group>0</Group>
<RequestURI>”.*@domain.com.*”</RequestURI>
</SPT>
<SPT>
<ConditionNegated>0</ConditionNegated>
<Group>1</Group>
<Method>INVITE</Method>
</SPT>
<SPT>
<ConditionNegated>0</ConditionNegated>
<Group>1</Group>
<RequestURI>”＾(0755).*”</RequestURI>
</SPT>
</TriggerPoint>
<NextHops>
<HopName>sip:IBCF@long.com</HopName>
<DefaultHandling>1</DefaultHandling>
</NextHops>
</InitialRouteCriteria>
</RouteProfile>
</IMSSubscription>
</testDatatype>
In the above-described embodiments, label＜HopName〉sip:IBCF@long.com＜/HopName provided the matching initial routing rule after, next jumping that request needs to arrive is the IBCF of long.com network for domain name, equally, if wish through multi-hop (a plurality of entity), can repeatedly use label＜HopName 〉, provide in order wish to arrive respectively jump the address.Certainly, the entity that provides in the above-mentioned address can be loose route, also can be strict route, and is promptly different according to the loose and stringent condition of selecting route.
IRC represents user's tactful route data of contracting, by HSS process Cx reference point (3GPP definition HSS and S-CSCF interface are Cx), after receiving the SAR of S-CSCF (Server-Assignment-Request) order, use SAA (Server-Assignment-Answer, server-assignment is replied) order to send to S-CSCF.
HSS can use PPR (Push-Profile-Request pushes configuring request) order, and iRC among the S-CSCF is upgraded in request.In case sending, data revise, this renewal is carried out at once, has only a kind of situation exception: when S-CSCF is being a non-registered users service, when perhaps S-CSCF is retained to a non-registered users, the PPR order is confirmed that by PPA (Push-Profile-Answer) order the result of aforesaid operations is simply pointed out in the PPA order.
It should be noted that working as S-CSCF receives call request, when handling iRC, if trigger iFC simultaneously, S-CSCF should preferentially carry out iFC, executes iFC and carries out iRC afterwards again; If when carrying out iRC, in request message, there has been the Route header field, at this moment S-CSCF carries out and triggers iRC, if iRC coupling, can add existing Route header field to next jumping (or multi-hop) that provides among the iRC, can be increased to Route header field address list top, also can be increased to the tabulation end, S-CSCF sends to next jumping according to Route header field route with request message; If when carrying out iRC, in request message, there is not the Route header field, if iRC coupling, S-CSCF can use next jumping (or multi-hop) that provides among the iRC Route header field to carry and be increased in the request message, and parsing Route header field address list top address, as next jumping, send a request message.S-CSCF also can directly send to this address to request message, increases the Route header field in the request message and not be used in.
As previously mentioned, the equal access subscription data of first logical ne A storage user in the inventive method example, this first logical ne A obtains user's routing policy according to user's equal access subscription data, finishes (to user signatory operator) routing function by certain second logical ne B again.IRC realizes that S-CSCF realizes a kind of method of routing policy, can also use other method to realize routing policy.
When being AGCF, the first logical ne A (inserts traditional PSTN/isdn user), dialling the destination address that cries as the user is 0-755-6540808, it is CHINAUNICOM that the user will be chosen as its operator that long-distance service is provided, then call out through behind the AGCF, the new destination address that carries in the call signaling that sends becomes 193-755-6540808.Attempt converting tel URL 193-755-6540808 to SIP URI by S-CSCF, behind convert failed, route the call to BGCF, BGCF does number analysis, select MGCF to go into the CS territory, CHINAUNICOM's network of selecting 193 correspondences in the CS territory is as long-distance service provider, its signalling route path (omit other service conditions take place) as shown in Figure 2.
When the first logical ne A was S-CSCF, as described in above-mentioned iRC method, signaling paths wherein, made the IBCF of all message that go out this territory through this territory by the network planning or configuration means as shown in Figure 3.
When the first logical ne A was equal access AS, S-CSCF carried out equal access iFC, routes the call to equal access AS, and equal access AS carries out service logic, increased the Route header field in request message, provided user's signing service operator address in the header field.And request message returned to S-CSCF, by Route header field in the S-CSCF analysis request message, finish Route Selection.Its signaling paths wherein, makes all message that go out this territory IBCF through these territories by the network planning or configuration means as shown in Figure 4, and when calling out CS territory user, AS can FH-number transform, inserts signatory operator sign; When domain user to call IMS, AS can increase signatory carrier network IBCF2 address in the Route header field in request message.
When the first logical ne A was BGCF, BGCF sent to user's signing service carrier network according to user contracting data with request message, and its signaling paths as shown in Figure 5 at this moment.
When the first logical ne A was IBCF, IBCF sent to user's signing service carrier network according to user contracting data with request message, and its signaling paths as shown in Figure 6.
The inventive method can independently be selected service provider by realizing that in packet network the terminal use uses equal access, to the good inheritance that has of the basic service feature in the conventional telecommunications net, has also guaranteed the fairness of competition simultaneously.The inventive method gives a kind of initial routing rule simultaneously, by using this rule, can make S-CSCF finish tactful route according to user contracting data.
Should be understood that above-mentioned description at specific embodiment is comparatively detailed, can not therefore be interpreted as the restriction to scope of patent protection of the present invention, scope of patent protection of the present invention should be as the criterion with claims.

Claims (13)

1, a kind of method of initial route filtering, it is encoded with extend markup language, be used for the equal access subscription data of storage user in one first logical ne of network, and obtain user's routing policy thus, described routing policy is for carrying out initial routing rule; Finish routing function by one second logical ne to the signatory operator of user;
At described first logical ne is the service call conversation control function unit, when described service call conversation control function unit is second logical ne simultaneously, initial routing rule is sent to the service call conversation control function unit of serving into the user by home subscriber server, described initial routing rule is carried out to finish tactful route, wherein in described service call conversation control function unit when the user makes a call conversation request
Described initial routing rule comprises user's equal access subscription data, and comprises:
In root element, comprise privately owned identification (RFID) tag and routing configuration label;
Described privately owned identification (RFID) tag is used to provide the privately owned identify label of user;
Described routing configuration label comprises public identify label label of user and route filtering rule label, and the public identify label label of described user is used to provide the unified resource sign and/or the phone URL(uniform resource locator) of user conversation initializtion protocol; Described route filtering rule label comprises trigger point label and tactful routing iinformation label; Described trigger point label is used to provide the service point triggers relation and service point triggers is described; Described tactful routing iinformation label is used to be given in the tactful route after the coupling service point triggers is described condition; In service point triggers is described, comprise environment description label, service point triggers group label and service point triggers matching condition.
2, method according to claim 1 is characterized in that, in the label of described trigger point, adopts the normal state expression formula to describe each service point triggers, and described service point triggers matching condition comprises:
Request unified resource identification (RFID) tag is used to identify this request resource pointed;
Conversation initialized protocol method label is used to represent the type of this request;
The conversation initialization protocol message head is used to comprise the information relevant with this request;
The session scenario label is used to provide three probable values of session, comprises that conversation start, session termination, session stop unregistered;
The conversation description label is used to define the service point triggers at any Session Description Protocol field contents in the conversation initialized protocol method body.
3, method according to claim 1 is characterized in that, when not providing the trigger point, expression unconditionally is routed to assigned address.
4, method according to claim 1 is characterized in that, in the label of described trigger point, can adopt to connect the normal state expression formula and separate normal state expression formula association service point trigger.
5, method according to claim 4 is characterized in that, when adopt connecting normal state expression formula association service point trigger, use earlier exclusive disjunction connect on the same group in different matching conditions, the back use is connected not matching condition on the same group with computing.
6, method according to claim 4 is characterized in that, when adopt separating normal state expression formula association service point trigger, uses earlier and different matching conditions in computing connects on the same group, and the connection of back use exclusive disjunction is on the same group matching condition not.
7, method according to claim 2 is characterized in that, in tactful routing iinformation label, is given in the tactful routing iinformation after the coupling service point triggers is described condition, and described tactful routing iinformation comprises a jumping or the multi-hop that tactful route need be passed through.
8, method according to claim 7, it is characterized in that, described service call conversation control function unit is behind match triggers point, and the method for the tactful route that provides in the implementation strategy routing iinformation label comprises: the call session request message is sent to next jumping that provides in the tactful routing tag.
9, method according to claim 7, it is characterized in that, described service call conversation control function unit is behind match triggers point, and the method for the tactful route that provides in the implementation strategy routing iinformation label comprises: with jumping or the multi-hop address information is put into the Route header field of call request message that the tactful route that comprises in the tactful routing iinformation need be passed through.
10, method according to claim 7 is characterized in that, when having initial filter criteria and initial routing rule simultaneously, described service call conversation control function unit is carried out initial filter criteria earlier, carries out initial routing rule again.
11, method according to claim 9, it is characterized in that, initial routing rule is being carried out in described service call conversation control function unit, with jumping or multi-hop when putting into the Route header field of call request message that the tactful route that comprises in the tactful routing iinformation need be passed through, if in call request message, comprised the Route header field, with jumping or the address information of multi-hop is put into the top or the bottom of the Route header field of call request message of comprising in the tactful routing iinformation that tactful route need pass through.
12, method according to claim 1, it is characterized in that, after described home subscriber server receives the server-assignment request command of service call conversation control function unit, use server-assignment to reply and send initial routing rule to the service call conversation control function unit.
13, method according to claim 1 is characterized in that, after user's equal access subscription data that described home subscriber server is preserved upgrades, uses the propelling movement configuring request to upgrade initial routing rule to described service call conversation control function unit.
CNB200610033975XA 2006-02-22 2006-02-22 Equal access and initial route filtering method for packet network Expired - Fee Related CN100466572C (en)

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