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WO2008125063A1 - Procédé, système et appareil de route appelée - Google Patents

Procédé, système et appareil de route appelée Download PDF

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Publication number
WO2008125063A1
WO2008125063A1 PCT/CN2008/070727 CN2008070727W WO2008125063A1 WO 2008125063 A1 WO2008125063 A1 WO 2008125063A1 CN 2008070727 W CN2008070727 W CN 2008070727W WO 2008125063 A1 WO2008125063 A1 WO 2008125063A1
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WO
WIPO (PCT)
Prior art keywords
request message
call request
network element
domain
user
Prior art date
Application number
PCT/CN2008/070727
Other languages
English (en)
Chinese (zh)
Inventor
Dongming Zhu
Hengliang Zhang
Songhai Ye
Chunyan Ding
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
Publication date
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2008125063A1 publication Critical patent/WO2008125063A1/fr

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Classifications

    • 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
    • H04L65/1066—Session management
    • H04L65/1069—Session establishment or de-establishment
    • 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
    • H04L65/1066—Session management
    • H04L65/1083—In-session procedures
    • H04L65/1095—Inter-network session transfer or sharing
    • 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]

Definitions

  • the present invention relates to the field of communications, and in particular, to a method, system and apparatus for called routing. Background technique
  • IMS IP Multimedia Subsystem
  • WCDMA Wideband Code Division Multiple Access
  • IP IP Multimedia Subsystem
  • 3G 3 rf Generation
  • the mobile network implements packet voice and packet data to provide a unified multimedia service and application target network.
  • the IMS adopts the IP packet domain as the bearer channel for its control signaling and media transmission, and uses the Session Inition Protocol (SES) as the call control signaling.
  • SES Session Inition Protocol
  • the IMS user subscription data is centrally managed in the Home Subscriber Server (hereinafter referred to as: HSS), the service is uniformly provided by the application server AS, and the session control is controlled by the service-call session control function (Serving-Call Session).
  • HSS Home Subscriber Server
  • AS the service-call session control function
  • S-CSCF service-call session control function
  • the multiple ASs can work together.
  • P-CSCF current location proxy node proxy-proxy-Call Session Control Function
  • GRUU Globally Routable User Agent identifier
  • GRUU is a combination of the "Instance ID” of the IMPU and the UE.
  • the "Instance ID” is a globally unique ID used to identify "UE Instance”, so that the GRUU can uniquely identify a UE. Even if the IMPU is shared by multiple UEs, using the GRUU as a "REQUEST URI" can ensure that SIP messages are sent to the uniquely designated UE.
  • Another mechanism is the "Caller Preferences" proposed by the IETF in RFC 3841. This mechanism is used in conjunction with the above feature tag.
  • the calling party can specify that some called terminals should have according to the attributes of the session.
  • the application characteristics (carried in the Accept-contact header field), or application characteristics that should not be available, allow the network to search for the most suitable terminal for connection according to the specified application capability among the multiple terminals used by the called party.
  • the dynamic service activation information (Dynamic Service Activation Information; DSAI) is an identifier that identifies whether a service is activated or not. It allows the AS to dynamically set whether a service is activated or not. If no activation is required, set a service to "Inactive" through the SH interface.
  • the HSS sets the service trigger rule (Initial Filter Criteria; the following cartridge: iFC) corresponding to the service to "Inactive”, and the updated The iFC is delivered to the S-CSCF, so that the call will not be triggered to the corresponding AS.
  • the essence of DSAI is that the AS can activate or deactivate one or some iFCs as needed to control the session routing.
  • the domain selection entity DSF selects a CS domain connection session, it determines the routing number (CSRN) to the CS domain, and the VCC AS modifies the "Request-uri" to the routing number of the CS domain ( CS Domain Routing Number; The following cartridge is called: CSRN), so that the call is routed to the CS domain, so that the call will not be triggered to other ASs again.
  • CSRN CS Domain Routing Number
  • the S-CSCF receives a call request message directed to the user.
  • the S-CSCF triggers the call request message to the DSF according to the triggering rule of the iFC.
  • DSF performs domain selection, selects the CS domain connection session according to its own domain selection rule, and determines CSRN.
  • the DSF sends the call to the S-CSCF.
  • the S-CSCF finds that the "Request-uri" is CSRN and routes the call request message to the MGCF (the interaction with the BGCF is omitted).
  • the MGCF determines the MSRN according to the CSRN, and then routes the call request message to the original called user.
  • the DSF After the DSF selects the CS domain connection session, it will change the Request-uri to CSRN, so that the call will be routed directly to the CS domain through the S-CSCF, but in the ICS (IMS Centlised Service) topic, it needs to be in the S-CSCF.
  • the ICCF is inserted before the call is routed to the CS domain, so that the ICCF can participate in the control of subsequent services. Summary of the invention
  • the embodiment of the invention provides a method, a system and a device for routing a called party.
  • the user agent network element can be inserted into the call path, and the call request message is routed to the user agent network element. user.
  • the method for routing the called party according to the embodiment of the present invention includes: after the domain selection entity DSF selects the connection session to the CS domain, adding the call request message to the user agent network element in the call request message sent to the S-CSCF The S-CSCF routes the call request message to the user agent network element according to the related information; and the user agent network element routes the call request message to the original called user via the CS domain.
  • the domain selection entity of the embodiment of the present invention includes: a domain selection unit, configured to select a connection session to the CS domain or a connection session to the PS domain; and a first adding unit, configured to: when the domain selection unit selects a connection session to the CS domain, The call request message to be delivered is added to the information related to the user agent network element, and the sending unit is configured to send the call request message processed by the first adding unit to the S-CSCF.
  • the user agent network element of the embodiment of the present invention includes: a receiving unit, configured to receive a call request message;
  • An obtaining unit configured to obtain a routing number of the original called user number or the CS domain; a determining unit, configured to determine routing information according to the original called user number or the routing number of the CS domain acquired by the acquiring unit; the routing unit, configured to Determining the routing information determined by the unit, and routing the call request message to the original called user via the CS domain.
  • the system of the called route of the embodiment of the present invention includes: a DSF, an S-CSCF, and a user agent network element; the DSF is configured to select a connection session to the CS domain, and add the call request message sent to the S-CSCF. Routing the call request message to related information of the user agent network element; the S-CSCF is configured to route the call request message to the user agent network element according to the related information; the user agent network element, and the call request message is sent to the CS The domain is routed to the original called user terminal.
  • Another called routing method in the embodiment of the present invention includes: when a user attaches in the CS domain and is not registered in the PS domain, the user agent network element triggers iFC activation to the user agent network element through the DSAI mechanism; When the CS domain connection session is selected, the call request message is sent to the S-CSCF; the S-CSCF triggers the call request message to the user agent network element according to the iFC; and the user agent network element passes the call request message to the CS The domain is routed to the original called user.
  • the related information for routing the call request message to the user agent network element is added to the call request message sent to the S-CSCF, and the S-CSCF may be based on the correlation.
  • the information is routed to the user agent network element; the user agent network element then routes the call request message to the original called user via the CS domain according to the obtained routing information. Therefore, after the DSF is selected to the CS domain connection session, the user agent network element can be inserted in the call path, and the call request message is routed to the user via the CS domain via the user agent network element, which satisfies the requirements of the ICS problem.
  • FIG. 1 is a flow chart of a route after an existing DSF selects a connection session to a CS domain;
  • FIG. 2 is a flow chart of steps of a method for called routing according to an embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of a domain selection entity according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of a user agent network element according to an embodiment of the present invention.
  • FIG. 5 is a flowchart of Embodiment 1 of the present invention.
  • Embodiment 9 is a flowchart of Embodiment 5 of the present invention.
  • FIG. 10 is a flowchart of another method for routing a called method according to an embodiment of the present invention.
  • FIG 11 is a flow chart of Embodiment 6 of the present invention. detailed description
  • IMS is a description of 3GPP and Tispan (Telecommunications and Internet Converged Services and Protocols for Advanced Networking).
  • 3GPP2 there is also a similar multimedia subsystem called Multimedia Domain (hereinafter referred to as MMD), which is similar in structure to IMS. 4.
  • MMD Multimedia Domain
  • a user agent network element can be inserted in the call path, and the call request message is routed to the user via the user agent network element.
  • the embodiment of the present invention is an example in which the AS is used as a user agent network element, but the user agent network element is not limited to being placed on the AS, but may also be placed on the enhanced MSC (Mobile Switching Center).
  • MSC Mobile Switching Center
  • An embodiment of the present invention provides a method for called routing, as shown in FIG. 2, including the following steps:
  • the DSF adds related information for routing the call request message to the user agent network element in a call request message sent to the S-CSCF.
  • the related information may be a public service identifier of the user agent network element (Public Service Identity; the following is called: PSI); then the DSF obtains the PSI of the user agent network element, including the following steps: The DSF sends signaling to the HSS to obtain the original Calling the MSRN of the user; the user agent network element performs signaling interception, and returns the PSI of the user agent network element in the response message of the intercepted signaling; and the DSF obtains the PSI of the user agent network element from the response message.
  • PSI Public Service Identity
  • the DSF obtains the PSI of the user agent network element from the local static configuration. Or,
  • the related information is the calling preference information
  • the DSF obtains the calling preference information, including the following steps:
  • the user agent network element replaces the user registration, the user carries the "Feature tag" in the registration request message; the S-CSCF takes the user's " Feature tag” is reported to DSF, DSF will
  • the feature tag is used as the calling preference information, that is, the calling preference information is carried in the "invite", but the calling preference information, the information corresponding to the called side is the feature tag of the called user. or,
  • the related information is the GRUU of the user agent network element; the DSF obtaining the GRUU of the user agent network element includes the following steps: The user agent network element carries the "instance-id" in the registration request message when replacing the user registration; S-CSCF The GRUU is allocated to the user agent network element according to the "instance-id" in the received registration request message, and the GRUU is reported to the DSF. Or,
  • the related information is the information that triggers the initial filtering rule iFC, and the S-CSCF performs iFC matching according to the related information added by the DSF in the call request message, and triggers the call request message to the user agent network element according to the matched iFC. .
  • the S-CSCF routes the call request message to the user agent network element according to the related information.
  • the user agent network element routes the call request message to the original called user (that is, the called user originally pointed to by the call request message) according to the obtained routing information.
  • the embodiment of the present invention further provides a domain selection entity, as shown in FIG. 3, which includes: a domain selection unit 11, a first adding unit 12, and a sending unit 13; further comprising: an obtaining unit 14 and a second adding unit 15 .
  • the domain selection unit 11 is used to select a CS domain connection session or a PS domain connection session.
  • the obtaining unit 14 is configured to obtain related information for routing the call request message to the user agent network element, and the processing is performed by the first adding unit 12.
  • the first adding unit 12 is configured to add related information for routing the call request message to the user agent network element in the call request message to be sent when the domain selection unit selects the CS domain connection session.
  • the second adding unit 15 is configured to add the original called user number or the routing number of the CS domain to the call request message to be delivered.
  • the sending unit 13 is configured to add the first adding unit 12, or the first adding unit 12 and the second adding
  • the call request message processed by the unit 15 is sent to the S-CSCF.
  • the embodiment of the present invention further provides a user agent network element. As shown in FIG. 4, the method includes: a receiving unit 21, an obtaining unit 22, a determining unit 23, and a routing unit 24.
  • the receiving unit 21 is configured to receive a call request message.
  • the obtaining unit 22 is configured to obtain the routing number of the original called user number or the CS domain.
  • the determining unit 23 is configured to determine routing information according to the original called user number or the routing number of the CS domain acquired by the obtaining unit 22.
  • the routing unit 24 is configured to route the call request message to the original called user via the CS domain according to the routing information determined by the determining unit 23.
  • the embodiment of the present invention further provides a system for called routing, including: DSF (ie, DSF in the embodiment of the present invention), S-CSCF, and user agent network element.
  • DSF ie, DSF in the embodiment of the present invention
  • S-CSCF Serving Call Control Function
  • the DSF is configured to select a connection session to the CS domain, and add related information for routing the call request message to the user agent network element in a call request message sent to the S-CSCF.
  • the S-CSCF is configured to route the call request message to the user agent network element according to the related information.
  • the user agent network element is configured to, according to the obtained routing information, route the call request message to the original called user terminal via the CS domain.
  • the S-CSCF receives a call request message directed to the user.
  • the S-CSCF triggers the call request message to the DSF according to the triggering rule of the iFC.
  • the DSF performs domain selection, according to its own domain selection rule, selects a CS domain connection session, and sends an SRI command to the HSS to obtain the mobile station roaming number of the original called user (mobile station roaming number; the following cylinder: MSRN) .
  • the ICCF performs signaling interception and returns its own PSI in the response message of the SRI message. 5.
  • the DSF fills in the PSI of the ICCF obtained from the response message into the "Request-uri" of the call request message, and sets the routing number of the CS domain of the original called user (CS Domain).
  • CSRN Converted from MSRN to fill in the "P-Called-Party-ID" header field of the call request message (or fill the CSRN of the original called user to "History-info" In the header field, or in other header fields, then the call request message is sent to the S-CSCF.
  • the S-CSCF routes the call request message to the ICCF according to the PSI of the ICCF in the "Request-uri" of the call request message.
  • the ICCF determines the CSRN of the original called user, and fills the CSRN into the "Request-uri" of the call request message, and then delivers the call request message to the S-CSCF.
  • the S-CSCF finds that the "Request-uri" in the call request message is CSRN, and routes the call request message to the MGCF (the interaction with the BGCF is omitted).
  • the MGCF determines the MSRN based on the CSRN and then routes the call request message to the original called user.
  • the S-CSCF receives a call request message directed to the user.
  • the S-CSCF triggers the call request message to the DSF according to the triggering rule of the iFC.
  • the DSF performs domain selection, selects a CS domain connection session according to its own domain selection rule, and fills the configured ICCF PSI into the "Request-uri" of the call request message, and the number of the original called user. Fill in the message to the "P-Called-Party-ID" header field of the call request message (or fill in the number information of the original called user into the "History-info" header field, or other header fields), and then place the call.
  • the request message is delivered to the S-CSCF.
  • the S-CSCF routes the call request message to the ICCF according to the PSI of the ICCF in the "Request-uri" of the call request message.
  • the ICCF determines the CSRN of the original called user, and fills in the CSRN to the call request. In the "Request-uri" of the message, the call request message is then sent to the S-CSCF.
  • the S-CSCF finds that the "Request-uri" in the call request message is CSRN, and routes the call request message to the MGCF (the interaction with the BGCF is omitted).
  • the MGCF determines the MSRN based on the CSRN and then routes the call request message to the original called user.
  • the call request message is routed to the ICCF through the calling preference mechanism, and the call request message is routed to the user through the CSRN. Referring to FIG. 7, the following steps are included: 1.
  • the S-CSCF receives a call request message directed to the user (the "Request-uri" of the call request message carries the original called subscriber number information).
  • the S-CSCF triggers the call request message to the DSF according to the triggering rule of the iFC.
  • the routing number ( CSRN ) of the CS domain carried in the "P-Called-Party-ID" header field or the "History-info” header field.
  • the call request message is then sent to the S-CSCF.
  • the CSRN carried in the "History-info" header field is filled in the "Request-uri” of the call request message, and then the call request message is sent to the S-CSCF; or carried in the "Request-uri” according to the call request message.
  • the original called subscriber number information determines the CSRN, and the CSRN is filled in the "Request-uri" of the call request message, and then the call request message is sent to the S-CSCF.
  • the S-CSCF finds that the "Request-uri" in the call request message is CSRN. Called to MGCF (omitting the interaction with BGCF).
  • the MGCF determines the MSRN based on the CSRN and then routes the call to the original called user.
  • the ICCF is required to report that the access network type of the user is CS by using the Feature tag mechanism.
  • the DSF can also fill in the information that rejects the PS access, such as:
  • Information equivalent to the CS connection session Accept-Contact: Access-type CS.
  • the AS is used as the user agent network element.
  • the user agent network element is in the VMSC, the above steps 5-7 can be omitted, and the VMSC directly delivers the call to the user.
  • the S-CSCF receives a call request message directed to the user.
  • the S-CSCF triggers the call request message to the DSF according to the triggering rule of the iFC.
  • the DSF performs domain selection, selects a CS domain connection session according to its own domain selection rule, and fills the GCF of the ICCF into the "Request-uri" of the call request message, and puts the number information of the original called user. Go to the "P-Called-Party-ID" header field or the "History - info” header field. The call request message is then sent to the S-CSCF.
  • the S-CSCF locates the connection to the ICCF according to the GRUU in the "Request-uri" of the call request message, and then routes the call request message to the ICCF.
  • the ICCF finds the number information of the original called user from the "P-Called-Party-ID" header field of the call request message or the "History - info” header field, and changes the "Request-uri” to the original called party. The user's number information is then sent to the MGCF.
  • the MGCF routes the call to the user according to the normal call flow.
  • the ICCF is required to logically generate an "instance-id" when the user is registered instead, so that the S-CSCF can use the "instance-id" to allocate a GRUU to the ICCF, and report the GRUU to the DSF.
  • the AS is used as the user agent network element.
  • the user agent network element is in the VMSC, the above steps 5-6 can be omitted, and the VMSC directly delivers the call to the user.
  • the S-CSCF receives a call request message directed to the user.
  • the "Request-uri" of the call request message carries the original called subscriber number information).
  • the S-CSCF triggers the call request message to the DSF according to the triggering rule of the iFC.
  • the DSF performs domain selection, selects a CS domain connection session according to its own domain selection rule, and adds in the Accept-Contact header field of the call request message, or the "History-info" header field or other header fields.
  • the S-CSCF is instructed to route the call request message to the trigger information of the iFC of the ICCF, and then the call request message is sent to the S-CSCF. And carrying the CS domain routing number (CSRN) in the "P-Called-Party-ID" header field or the "History-info" header field of the call request message.
  • the call request message is then sent to the S-CSCF.
  • the S-CSCF routes the call request message to the ICCF according to the triggered iFC.
  • the ICCF determines the CSRN according to the original called subscriber number information carried in the "Request-uri" of the call request message, or directly from the "P-Called-Party-ID" header field or the "History-info” header field.
  • the CSRN is obtained, and the CSRN is filled in the "Request-uri" of the call request message, and then the call request message is sent to the S-CSCF.
  • the S-CSCF finds that "Request-uri" is CSRN and routes the call request message to
  • the MGCF determines the MSRN based on the CSRN and then routes the call request message to the original called user.
  • the embodiment of the present invention further provides another called routing method, as shown in FIG. 10, including the following steps:
  • the user agent network element is triggered by the DSAI mechanism.
  • the iFC activation of the user agent network element is triggered by the DSAI mechanism.
  • the call request message is sent to the S-CSCF.
  • the S-CSCF triggers the call request message to the user agent network element according to the iFC.
  • the user agent network element routes the call request message to the original called user via the CS domain according to the obtained routing information.
  • the call request message is routed to the ICCF through the DSAI mechanism, and the call request message is routed to the user through the CSRN. Referring to Figure 11, the following steps are included:
  • the S-CSCF receives a call request message directed to the user.
  • the S-CSCF triggers the call request message to the DSF according to the triggering rule of the iFC.
  • the DSF performs domain selection, selects a connection session to the CS domain according to its own domain selection rule, and can carry in the "P-Called-Party-ID" header field or the "History-info” header field of the call request message.
  • the routing number (CSRN) of the CS domain is then sent to the S-CSCF.
  • the S-CSCF triggers the call request message to the ICCF according to the triggering rule of the iFC.
  • the ICCF obtains the MSRN of the original called user through the HSS/HLR to VLR query, determines the CSRN of the original called user according to the MSRN, and fills the CSRN into the "Request-uri" of the call request message, and then puts the call.
  • the request message is delivered to the S-CSCF. You can also use the "P-Called-Party-ID" header field of the call request message or the routing number (CSRN) of the CS domain carried in the "History-info" header field.
  • the S-CSCF finds that the "Request-uri" is CSRN and routes the call request message to the MGCF (the interaction with the BGCF is omitted).
  • the MGCF determines the MSRN based on the CSRN and then routes the call request message to the original called user.
  • the ICCF is required to use the DSAI mechanism to activate the iFC routed to the ICCF. Then send it to the S-CSCF for use in step 4.
  • the call request message does not need to be routed to the ICCF.
  • the user agent network element will trigger the iFC to the user agent network element to deactivate through the DSAI mechanism.
  • the ICCF obtains the MSRN of the original called user through the HSS/HLR to VLR query, and then determines the CSRN of the original called user according to the MSRN, and the same applies in Embodiments 1 to 5.
  • Embodiments 1 to 5 The manner in which the ICCF obtains routing information is also applicable in this embodiment.
  • the DSF after the DSF selects the CS domain connection session, the DSF sends a call request message sent to the S-CSCF to the related information of the user agent network element, so S The CSCF may route the call request message to the user agent network element according to the related information; then the user agent network element routes the call request message to the original called user via the CS domain according to the obtained routing information. Therefore, after the DSF selects the CS domain connection session, the user agent network element can be inserted in the call path, and the call request message is routed to the user via the CS domain via the user agent network element, which satisfies the requirements of the ICS problem.
  • first to fifth embodiments described above respectively describe different situations in which the call request message is routed to the related information of the user agent network element.
  • the user agent network element when the user is attached in the CS domain and is not registered in the PS domain, the user agent network element triggers the iFC activation to the user agent network element through the DSAI mechanism; after the DSF selection to the CS domain connection session is implemented, A user agent network element can be inserted in the call path, and the call request message is routed to the user via the CS domain via the user agent network element, which satisfies the requirements of the ICS subject.

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  • Engineering & Computer Science (AREA)
  • Business, Economics & Management (AREA)
  • General Business, Economics & Management (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Cette invention concerne un procédé, un système et un appareil de route appelée, permettant d'introduire un élément de réseau d'agent utilisateur dans le chemin d'appel, puis d'acheminer le message de demande d'appel jusqu'à l'utilisateur par l'intermédiaire de l'élément de réseau d'agent utilisateur après avoir obtenu que la fonction DSF sélectionne une session de successions vers le champ de CS. Le procédé décrit dans cette invention comprend les étapes suivantes: après sélection par la fonction de sélection de domaine (DSF) de la session de successions vers le champ de CS, ajout, dans le message de demande d'appel envoyé/transmis à S-CSCF, des informations associées concernant le message de demande d'appel acheminé vers l'élément de réseau d'agent utilisateur d'après les informations associées, puis acheminement par l'élément de réseau d'agent utilisateur du message de demande d'appel jusqu'à l'utilisateur appelé d'origine par l'intermédiaire du champ de CS.
PCT/CN2008/070727 2007-04-17 2008-04-16 Procédé, système et appareil de route appelée WO2008125063A1 (fr)

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CN200710100494.0A CN101291448A (zh) 2007-04-17 2007-04-17 被叫路由的方法、系统及装置
CN200710100494.0 2007-04-17

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US20070076691A1 (en) * 2005-09-30 2007-04-05 Varney Douglas W Method and apparatus for allowing peering relationships between telecommunications networks

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1832440A (zh) * 2005-03-10 2006-09-13 朗迅科技公司 使用既有设备的ims网络接入
CN1842211A (zh) * 2005-03-30 2006-10-04 华为技术有限公司 一种实现路由控制的方法和系统
US20070076691A1 (en) * 2005-09-30 2007-04-05 Varney Douglas W Method and apparatus for allowing peering relationships between telecommunications networks

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