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WO2007095836A1 - Procédé d'égalité d'accès à un réseau par paquets et système associé - Google Patents

Procédé d'égalité d'accès à un réseau par paquets et système associé Download PDF

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Publication number
WO2007095836A1
WO2007095836A1 PCT/CN2007/000411 CN2007000411W WO2007095836A1 WO 2007095836 A1 WO2007095836 A1 WO 2007095836A1 CN 2007000411 W CN2007000411 W CN 2007000411W WO 2007095836 A1 WO2007095836 A1 WO 2007095836A1
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WIPO (PCT)
Prior art keywords
routing
user
routing policy
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initial
Prior art date
Application number
PCT/CN2007/000411
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English (en)
Chinese (zh)
Inventor
Bo Zheng
Youzhu Shi
Shibi Huang
Original Assignee
Huawei Technologies Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2007095836A1 publication Critical patent/WO2007095836A1/fr

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    • 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

Definitions

  • the present invention relates to access technologies for packet networks, and more particularly to methods and systems for achieving equal access in packet networks. Background of the invention
  • Equal access is a concept put forward in the environment of multiple operators. The essence of this is that a user (or a consumer) can, in an informed manner, be able to select different operators to serve them according to their own wishes.
  • the user can select an optimal access route according to the destination number, communication quality requirement, communication time, price, and the like.
  • a more common practice is to provide equal access services in the network. Users can sign different operators for different services.
  • the network can complete the operator's choice according to the user's contract signing intention.
  • the method of selecting an operator is generally called pre-selection.
  • the switching device In existing fixed networks, equal access is achieved by augmenting user attributes. In order to describe and record that users use different networks (or operators) under different services, add a m*n matrix table, where m represents the number of networks and n represents the number of services. Provides network options for up to n types of services, each offering the possibility to select m networks. In this way, the switching device records the contracted carrier data of the user's various services. When the user requests the service, the switching device analyzes the service attribute, selects the corresponding contracting operator in the matrix table according to the service attribute, and selects the route according to the selected contracting operator, and sends the service request to the selected carrier network.
  • the existing method of achieving equal access in a mobile network differs from the method of achieving equal access in a fixed network only in that MAP support is required for equal access in a mobile network.
  • the service contract data is transmitted by the service contractor, and the MSC (home domain and visited domain) is required to select a route according to the service contracting carrier.
  • Embodiments of the present invention provide a method and system for implementing equal access in a packet network, and achieve equal access of the network in a packet telecommunication network using SIP as a call control signaling of a core network.
  • a method for achieving equal access in a packet network including:
  • another method for achieving equal access in a packet network including:
  • the initial routing rule is executed upon receipt of the user call request message.
  • a system for achieving equal access in a packet network includes:
  • the first logical network element stores the equal access subscription data of the user, according to the equal access of the user Entering the subscription data to obtain the routing policy of the user, and carrying the routing policy in the call request message;
  • the second logical network element receives the call request message carrying the routing policy, and selects a route of the user subscription carrier according to the routing policy.
  • a system for achieving equal access in a packet network includes a service call session control function unit, configured to obtain a routing policy of a user according to the pre-stored equal access subscription data of the user; The user equally accesses the subscription data and the initial routing rule of the corresponding routing policy; and when the user call request message is received, the initial routing rule is executed.
  • a service call session control function unit for implementing equal access in a packet network includes: a setting unit, configured to obtain a routing policy of the user according to the pre-stored equal access subscription data of the user, And setting an initial routing rule including the user equal access subscription data and a corresponding routing policy; and an execution unit, when the user call request message is received, executing the initial routing rule.
  • the method and system for equal access in a packet network provided by the embodiments of the present invention enable an end user to select equal access in a packet network, and can independently select a service operator, and have basic service features in a traditional telecommunication network. Good inheritance, while ensuring the fairness of competition.
  • FIG. 1 is a schematic diagram of a network logical structure of a packet core network according to the present invention.
  • FIG. 2 is a schematic diagram of a signaling routing path according to Embodiment 2 of the present invention.
  • FIG. 3 is a schematic diagram of a signaling routing path according to Embodiment 5 of the present invention
  • 4 is a schematic diagram of a signaling routing path according to Embodiment 6 of the present invention
  • FIG. 5 is a schematic diagram of a signaling routing path when the first logical network element A and the second logical network element B are the same BGCF according to Embodiment 7 of the present invention.
  • FIG. 6 is a fifth schematic diagram of a signaling routing path of a method when a first logical network element A and a second logical network element B are the same BGCF according to Embodiment 7 of the present invention. Mode for carrying out the invention
  • the method for equal access in a packet network uses SIP as the call control signaling, and the network logical structure of the packet core network is shown in FIG. 1 , which is based on the European Telecommunications Standards Institute (ETSI, European Telecommunications).
  • ETSI European Telecommunications Standards Institute
  • TISPAN Internet Converged Services and Protocols for Advanced Networking
  • NTN Next Generation Network
  • the terminal accesses the packet core network through the network access unit, and the network access unit provides functions such as registration authentication and authentication, and the network access unit and the service call session control function (Serving-CSCF, Serving Call Session Control Function)
  • the El interface between the CSCFs is a SIP interface.
  • the network access unit may be a proxy call session control function (P-CSCF, Proxy-Call Session Control Function), access to a SIP terminal, or an access gateway control function (AGCF, Access Gateway). Control Function), access to traditional ordinary telephone service (POTS) terminals and ISDN terminals.
  • P-CSCF proxy call session control function
  • AGCF Access Gateway
  • Control Function access to traditional ordinary telephone service (POTS) terminals and ISDN terminals.
  • An application server (AS, Application Server) that implements equal access provides users with equal access subscription data, thereby providing routing policy data for the user to select the operator; and the S-CSCF actually processes the network session state.
  • Egress gateway control function (BGCF, Breakout Gateway Control Function) Select the network where the MGCF enters the PSTN.
  • the Media Gateway Control Function (MGCF, Media Gateway Control Function) communicates with the CSCF through the BGCF, and selects the CSCF based on the routing number of the incoming call from the legacy network.
  • the Interconnection Border Control Function (IBCF) is an interworking boundary function entity of the control plane between two operating networks.
  • the first embodiment of the present invention will be described in detail based on the above-mentioned NGN system, in a packet telecommunication network using SIP as the core network call control signaling, how the terminal user will sign the service operator, and the packet network uses the corresponding service when the terminal user uses the corresponding service.
  • the service request should be sent to the corresponding carrier network.
  • the first logical network element A in the network stores the equal access subscription data of the user, and the network element A obtains the routing policy of the user according to the equal access subscription data of the user, and the second logical network element B is obtained according to the obtained
  • the routing policy of the user completes the routing function for the subscriber contracted carrier.
  • the equal access subscription data is the business logic data of the contracted equal access service, and may include the user's selection of a specific network (or operator) for different services and/or applications, and the selection gives the corresponding specific service, and the user selects
  • the specific carrier information can be routed to the carrier network based on the information.
  • the network element A may be an access gateway control function (AGCF, Access Gateway Control Function), or an S-CSCF, or an equal access AS, or a BGCF, or an IBCF;
  • the network element B may be an S-CSCF, Or BGCF, or IBCF.
  • AGCF Access Gateway Control Function
  • S-CSCF Access Gateway Control Function
  • the network element A and the network element B may not be the same BGCF or IBCF, but an interoperable BGCF or IBCF.
  • the network element A is the S-CSCF
  • the network L A and the network element B should be the same S-CSCF.
  • the AGCF or the equal access AS obtains the routing policy of the user according to the equal access subscription data of the user, and then carries the routing policy in the call signaling, such as the SIP INVITE message, and then The network element B performs routing according to the routing policy.
  • the call signaling may carry a new destination address indicating the contracting operator, or directly Carry the address of the network element that has arrived at the contracting carrier, so that the call arrives at the contracting carrier according to the specified routing path.
  • the destination address dialed by the user is 0-755-6540808, the operator that the user chooses to provide long-distance service is China Unicom, and the call is carried in the call signaling after the AGCF or the equal access to the AS.
  • the destination address becomes 193-755-6540808.
  • the call signaling directly carries the network element address that arrives at the contracting carrier, so that the call arrives at the designated carrier according to the specified routing path, if the call passes the equal access to the AS, the call signaling, such as SIP, is sent.
  • the INVITE message can directly carry the address of the contract carrier's ingress network element IBCF in the Route header field.
  • the signing The data can be stored and managed as a service application data; when the first network element A is an S-CSCF, that is, when the subscription data is on the S-CSCF, the S-CSCF is independent of the service application in the standard definition. It cannot be stored and managed as a kind of business application data.
  • the S-CSCF can adopt a signing mechanism similar to the initial filtering rule (iFC, Initial Filter Criteria) defined by the current standard, and the equal access subscription data is used as a kind.
  • Extended user routing subscription data is stored and managed in the Home Subscriber Server (HSS).
  • an initial route rule iRC, Initial Route Criteria
  • the signaling path is as shown in Figure 2.
  • the network planning or configuration means allows all outgoing messages to pass through the IBCF of the local domain.
  • the iFC subscription data defined by the current standard indicates the initial filtering rule triggered by the user's service.
  • the iFC subscription data sets a series of filtering rules and an AS address corresponding to each filtering rule, and the filtering rule is carried in the SIP message.
  • S-CSCF passes the filter rule Match, get the address of the AS providing the service.
  • this embodiment extends an initial routing rule (iRC, Initial Route Criteria).
  • iRC Initial Route Criteria
  • a set of filtering rules and a routing address corresponding to each filtering rule are set in the iRC subscription data, and the expression of the filtering rule may be identical to the iFC and may be carried in the SIP message.
  • the S-CSCF obtains the next or several backward network element addresses by matching the filtering rules.
  • the S-CSCF downloads the iRC from the HSS.
  • the HSS actively updates to the S-CSCF.
  • iRC uses Extensible Markup Language (XML) encoding, including:
  • the private identification label and the routing configuration label are included; in the private identification label, the user private identity is given; in the routing configuration label, the user public identity label and the route filtering rule label are included;
  • the uniform resource identifier and/or the telephone uniform resource locator of the user session initialization protocol are given; in the route filtering rule label, the trigger point label and the routing policy information label are included; in the trigger point label, the service point trigger is given The relationship between the device relationship and the service point trigger; in the routing policy information tag, the routing policy that matches the description of the service point trigger is given; in the service point trigger tag, the environment description tag, the service point trigger group tag, and the service are included.
  • the point trigger matches the condition.
  • the service point trigger matching condition includes:
  • Session initialization protocol method tag used to indicate the type of the request
  • Session condition tag used to give three possible values of the session, including session start, session termination, and session termination are not registered
  • a normal expression is used to describe each service point trigger.
  • Service point triggers can be associated with a Conjunctive Normal Form and a Disjunctive Normal Form.
  • use the or (Or ) operation to connect different matching conditions in the same group, and then use the (And ) operation to connect the matching conditions of different groups.
  • use a separate normal expression to associate a service point trigger first use the (And ) operation to connect different matching conditions in the same group, and then use the or (Or ) operation to connect the matching conditions of different groups.
  • routing policy information label routing policy information matching the description of the service point trigger is given, where the routing policy information includes one or more hops that the policy routing needs to pass.
  • the tag ⁇ PrivateID> gives the user private ID
  • the tag ⁇ RouteProfile> can describe the user public identity ⁇ PublicIdentity> and the route filtering rule ⁇ InitialRouteCriteria>.
  • the user SIP URI and tel URL can be given.
  • the current route filtering rule trigger point is given.
  • the route ⁇ NextHops> that needs to pass after the matching is triggered.
  • the route that needs to pass after the triggering may be an entity, or Multiple entities, using the tag ⁇ HopName> gives the address of the entity.
  • a normal expression can be used to describe each service point trigger (SPT).
  • a Conjunctive Normal Form (CNF) is used, and each ⁇ 01"0 ⁇ > is connected with and, and an OR connection is used between each ⁇ Group> SPT.
  • CNF Conjunctive Normal Form
  • each ⁇ 01"0 ⁇ > is connected with and, and an OR connection is used between each ⁇ Group> SPT.
  • ⁇ 0)1 ⁇ 1 01 ⁇ 6 ⁇ &16 (1> is 1, indicating the current SPT, , NOT,,.
  • the matching can include:
  • Request U I (label ⁇ RequestU I> ) to identify the resource pointed to by the request;
  • the SIP message header (label ⁇ SIPHeader>) contains information related to the request. Among them, you can use the tag ⁇ Header> to describe the message header and ⁇ Content> to describe the message header content.
  • the ⁇ Content> description syntax is similar to iFC, for example, "Joe”: indicates that the given message header strictly matches the string "J 0e ,,, "(Jo).*”: indicates that the given message header uses the string " Jo "Beginning, and ".*Jo.*,,: indicates that the given message header contains the substring "Jo" anywhere.
  • Session case (label ⁇ SessionCase> ), giving three possible values for the session, enumeration Next:
  • Originating 0, indicating the start of the session
  • Terminating 1, indicating session termination
  • the session description (label ⁇ SessionDescription> ) defines a service point trigger for the contents of any SDP field within the SIP method body.
  • the syntax is consistent with the above ⁇ Content ⁇ method.
  • DFF Disjunctive Normal Form
  • the label ⁇ HopName>sip:IBCF@long.com ⁇ /HopName> gives the next hop that the request needs to reach after matching the initial routing rule, and the IBCF whose domain name is the long.com network.
  • the tag ⁇ HopName> multiple times, giving the hop addresses you want to arrive in order.
  • the entity given in the above address may be a loose route or a strict route, that is, according to the looseness and strict conditions of the selected route.
  • the iRC may use the CX reference point (the 3GPP defines the HSS and the S-CSCF interface to be Cx), and after receiving the S-CSCF server allocation request (SAR, Server-Assignment-Request) command, use the server to assign a response (SAA, Server). - Assig ⁇ ent-Answer ) command sends the iRC to the S-CSCF.
  • SAR S-CSCF server allocation request
  • SAA Server-Assignment-Request
  • the HSS may also send a Push-Profile-Request (PPR, Push-Profile-Request) command to the S-CSCF to request to update the iRC in the S-CSCF.
  • PPR Push-Profile-Request
  • the S-CSCF will update the iRC data as soon as it receives the PPR command.
  • the S-CSCF will send a push configuration response (PPA, Push-Profile-Answer) command, simply indicating S- The CSCF updates the results of the iRC, such as success or failure.
  • PPA Push-Profile-Answer
  • the S-CSCF when the S-CSCF receives the call request from the user, when the iRC is executed, if the iFC is triggered at the same time, the S-CSCF shall execute the iFC first, and then execute the iRC after executing the iFC. If the Route header field already exists in the call request message when the iRC is executed, the S-CSCF performs the trigger iRC. If the iRC matches, the next hop (or multi-hop) given in the iRC can be added to the existing Route header field. , can be added to the top of the Route header address list, or can be added to the bottom of the list. The S-CSCF sends a call request message to the next hop according to the route in the Route header field.
  • the Route header field does not exist in the request message. If the iRC matches, the S-CSCF adds a Route header field to the call request message, and carries the next hop (or multi-hop) given in the iRC to the call request. The Route header field of the message, and parse the Route header field The top address of the address list, as the next hop to send a call request message. The S-CSCF can also send the address of the next hop directly to the 4 bar call request message without adding the Route header field to the call request message.
  • the first logical network element A in the embodiment of the present invention stores the equal access subscription data of the user, and obtains the routing policy of the user according to the equal access subscription data of the user, and then is completed by the second logical network element B.
  • the routing function for the subscriber's contracted carrier. iRC is a method to implement S-CSCF to implement routing policies. Other methods can also be used to implement routing policies.
  • the first logical network element A is an AGCF (accessing a traditional PSTN/ISDN user)
  • the destination address dialed by the user is 0-755-6540808
  • the user needs to select an operator for providing long-distance service.
  • the new destination address carried in the call signaling is changed to 193-755-6540808.
  • the S-CSCF attempts to convert tel UKL 193-755-6540808 into a SIP URI, and after the conversion fails, routes the call to the BGCF.
  • the BGCF performs the number analysis, selects the MGCF into the circuit switched (CS, Circuit Switch) domain, and selects the China Unicom network corresponding to 193 in the CS domain as the long-distance service provider, and its signaling routing path (omitting other service situations) is as shown in FIG. Show.
  • the S-CSCF when the first logical network element A is equally connected to the AS, the S-CSCF first performs equal access to the iFC, and routes the call to the equal access AS corresponding to the iFC. Equally access the AS to execute the business logic, add the Route header field to the call request message, give the user subscription service carrier address in the Route header field, and return the call request message to the S-CSCF.
  • the S-CSCF parses the Route header field in the request message, obtains the address of the user subscription service carrier, and completes the routing.
  • the signaling path is as shown in FIG. 4, wherein when the called user belongs to another operating network, all the outgoing messages are passed through the IBCF of the local domain through network planning or configuration means; when the called user belongs to the CS domain user
  • the AS performs the number change and inserts the contracted carrier identifier.
  • the AS can use the Route message in the request message. Increase the subscription carrier network IBCF address in the header field.
  • the second logical network element B may be the same BGCF1.
  • the user subscription data is saved in the BGCF1, and the subscription user routing policy is obtained according to the user subscription data, and then the call request message is sent to the BGCF2 of the subscriber service provider network according to the subscription user routing policy.
  • the first logical network element A and the second logical network element B may also be interworking BGCFs.
  • the first logical network element A is IBCF1 (IBCF of the local domain) as shown in FIG. 6, the second logical network element B may be the same IBCF1.
  • the user subscription data is saved in the IBCF1, and the subscription user routing policy is obtained according to the user subscription data, and then the call request message is sent to the IBCF2 of the user subscription service operator network according to the subscription user routing policy.
  • the first logical network element A and the second logical network element B may also be interworking IBCFs.
  • the embodiment of the invention further discloses a system for implementing equal access in a packet network, comprising a first logical network element and a first logical network element.
  • the first logical network element stores the user's equal access subscription data in the first logical network element in the network, and the first logical network element obtains the user's routing policy according to the user's equal access subscription data; the first logical network element is received.
  • the routing policy of the user is applied; the second logical network element selects the route of the user subscription carrier according to the routing policy.
  • the first logical network element may be an AGCF, or an S-CSCF, or an AS, or a BGCF, or an IBCF; the second logical network element may be an S-CSCF, or a BGCF, or an IBCF.
  • the first logical network element is a BGCF or an IBCF
  • the first logical network element and the second logical network element may be the same BGCF or IBCF, or may not be the same BGCF or IBCF, but an interworking BGCF or IBCF.
  • the first logical network element is the S-CSCF
  • the first logical network element and the second logical network element of the network element should be the same S-CSCF.
  • a first S-CSCF and a second S-CSCF are included.
  • the first S-CSCF and the second S-CSCF are the same S-CSCF.
  • the first S-CSCF stores the user's equal access subscription data, and the first S-CSCF obtains the user's routing policy according to the user's equal access subscription data; the first S-CSCF receives the user call When the message is requested, an initial routing rule is executed; the second S-CSCF selects a route of the subscriber contracting carrier according to the routing policy.
  • the S-CSCF may include a setting unit and an execution unit, and the setting unit may obtain a routing policy of the user according to the pre-stored equal access subscription data of the user, and set equal access including the user.
  • the initial routing rule of the subscription data and the matching routing policy; and the executing unit may obtain the set initial routing rule from the setting unit when the user call request message is received, and execute the initial routing rule.
  • the initial routing rule includes a user equal access subscription data and a routing policy corresponding to the user equal access subscription data.
  • the initial routing rules are specifically described in the same manner as the foregoing embodiments.
  • an end user uses equal access, and can independently select a service operator, which has good inheritance to basic service features in a traditional telecommunication network, and also ensures fairness of competition.
  • the method of the present invention also provides an initial routing rule by which the S-CSCF can complete the routing policy based on the subscriber subscription data.

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Abstract

L'invention porte sur un procédé d'égalité d'accès à un réseau de télécommunications par paquets dont le protocole de lancement de session (SIP) est considéré comme étant la signalisation de la commande d'appel du réseau central et qui comporte les étapes suivantes: obtention de la politique de routage d'un utilisateur sur la base des données d'un contrat d'égalité d'accès préenregistré; et sélection d'une route de l'opérateur lié par contrat à l'utilisateur en fonction de la politique de route. Un autre procédé d'égalité d'accès à un réseau de télécommunications par paquets comporte un système d'égalité d'accès et une unité fonctionnelle de contrôle de session d'appel de services de mise en œuvre de l'égalité d'accès. Le schéma de l'invention assure l'égalité d'accès aux utilisateurs terminaux du réseau par paquets. Les utilisateurs passent contrat et utilisent l'égalité d'accès pour sélectionner indépendamment un opérateur de services; ils ont donc une bonne accession aux services de base dans les télécommunications conventionnelles et la loyauté des compétitions est assurée.
PCT/CN2007/000411 2006-02-22 2007-02-07 Procédé d'égalité d'accès à un réseau par paquets et système associé WO2007095836A1 (fr)

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