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WO2008000176A1 - Réseau ims et procédé de routage dans un réseau ims - Google Patents

Réseau ims et procédé de routage dans un réseau ims Download PDF

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Publication number
WO2008000176A1
WO2008000176A1 PCT/CN2007/070129 CN2007070129W WO2008000176A1 WO 2008000176 A1 WO2008000176 A1 WO 2008000176A1 CN 2007070129 W CN2007070129 W CN 2007070129W WO 2008000176 A1 WO2008000176 A1 WO 2008000176A1
Authority
WO
WIPO (PCT)
Prior art keywords
called
network
packet network
module
session request
Prior art date
Application number
PCT/CN2007/070129
Other languages
English (en)
Chinese (zh)
Inventor
Youzhu Shi
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 WO2008000176A1 publication Critical patent/WO2008000176A1/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
    • H04L65/10—Architectures or entities
    • H04L65/1016—IP multimedia subsystem [IMS]

Definitions

  • the present invention relates to the field of communications, and in particular, to an IP Multimedia Subsystem (IMS) network and an IMS routing method.
  • IMS IP Multimedia Subsystem
  • Session Initiation Protocol is used as the call control of packet-based core networks.
  • Signaling is one of the current technological trends, such as the IP Multimedia Subsystem (IMS) defined by the 3rd Generation Partnership Project (3GPP), and the IMS is also the International Telecommunication Union-Telecommunication Standards Department.
  • IMS IP Multimedia Subsystem
  • 3GPP 3rd Generation Partnership Project
  • IMS International Telecommunication Union-Telecommunication Standards Department.
  • ITU-T International Telecommunication Union - Telecommunication Standardization Sector
  • ETSI European Telecommunications Standards Institute
  • an IMS user needs to have a user identity in a Session Initiation Protocol Uniform Resource Identifier (SIP URI) format, and the IMS system addresses the user according to the user identity.
  • SIP URI Session Initiation Protocol Uniform Resource Identifier
  • the SIP URI includes "username,” and "domain name”, such as "smith@home.net”.
  • E.164 is The international public telecommunication numbering plan defined by the ITU-T E.164 series of standards, such as "86-755-28000000” or "86-13500000000”, etc.
  • Traditional circuit domain users generally only have user numbers in E.164 format; H.323 network Users, softswitch network users, etc.
  • E.164 numbers can also use E.164 numbers.
  • the packet identifiers in other formats such as an IP address, a Uniform Resource Locator (URL), or an H.323 URL, are partially used in the E.164 number format.
  • non-IMS networks that adopt all or part of the E.164 number format are collectively referred to as E.164 heterogeneous networks, including traditional circuit domain networks, H.323 networks, softswitch networks, and the like.
  • the calling party's serving call session control function entity uses the phone when performing the called route addressing process.
  • the Telephone Number Mapping (ENUM)/Domain Name System (DNS) translation mechanism translates the called E.164 number into a globally routable SIP URI; if the translation fails, the session request is sent To the Border Gateway Control Function Entity (BGCF), or any suitable entity of the calling home network (such as a media resource function controller to play a voice announcement); or, the S-CSCF sends an appropriate SIP response to the calling party.
  • BGCF Border Gateway Control Function Entity
  • the calling S-CSCF can always translate its E.164 number into the corresponding SIP URI via ENUM/DNS, if it cannot be translated.
  • SIP URI the called user is a traditional circuit domain user. That is: If the final called identity is translated in SIP URI format, then the called party is the IMS user or other packet domain user; if the final called identity is in E.164 format, then the called party is the traditional circuit domain user.
  • the existing packet domain addressing mechanism may cause a routing error because the E.164 number of the called user cannot be correctly translated into the corresponding packet identifier through ENUM/DNS.
  • the calling and called parties are cross-operator or cross-regional users, such as the calling party in China
  • the called party is an IMS user in the United States
  • the calling party dials "001-212-5552222"
  • the calling party belongs to the S-CSCF. It may not be possible to rely on ENUM/DNS to translate the number into a SIP URI registered in the United States.
  • the called party is treated as a user of the traditional circuit domain, and the session request initiated by the caller is routed to the traditional circuit domain, which obviously causes a routing error.
  • an embodiment of the present invention provides an IMS network, including a calling packet network and a called packet network, where the calling packet network is used to carry a called number in an E.164 format.
  • the tongue request is sent to the called packet network
  • the called packet network is configured to convert the called number in the E.164 format in the received session request into a packet identifier, and route the session request according to the result of the conversion.
  • the embodiment of the present invention further provides a routing method according to the foregoing IMS network, including the following steps:
  • the called packet network receives a session request carrying the called number in the E.164 format, and the
  • the called number in the E.164 format is converted into an IMS network packet identifier, and the session request is routed according to the result of the conversion.
  • the embodiment of the present invention further provides a second IMS network, including a calling packet network and a called packet network, where the calling packet network is configured to receive a session request from a calling user that carries the called number in the E.164 format.
  • the called packet network is used to route the session request.
  • the routing method according to the second IMS network proposed by the present invention includes the following steps:
  • the calling packet network receives a session request from the calling user that carries the called number in the E.164 format, and the E.164 format is used.
  • the called number is converted into an IMS user group identifier, and if the conversion fails, the tongue request is sent to the called packet network;
  • the called packet network routes the request.
  • FIG. 1 is a logic block diagram of a packet network in accordance with an embodiment of the present invention
  • FIG. 2 is a flow chart of a packet network routing according to an embodiment of the present invention. Mode for carrying out the invention
  • the packet network includes a calling packet network and a called packet network
  • the calling packet network includes a number translation database 102, a tongue control module 104, an interworking selection policy module 106, and an E.164 heterogeneous network interworking module. 108 and the interworking interface module 110.
  • the called packet network includes an interworking interface module 112, a session control module 116, an interworking selection policy module 118, a number translation database 124, an interworking interface module 122, and an E.164 heterogeneous network interworking module 120.
  • the number translation database 102 and the number translation database 124 are used to translate the E.164 number into a group identifier, and the group identifier may be a URL identifier such as a SIP URI or an H.323 URL, or an IP address.
  • the number translation database 102 and the number translation database 124 may be ENUM/DNS servers.
  • the session control module 104 and the session control module 116 are configured to process functions such as session requests, routing connections, and the like.
  • the Tongue Control Module 104, the Tongue Control Module 116 may be a Serving Call Session Control Function Entity (S-CSCF), or an Incoming Call Session Control Function Entity (I-CSCF).
  • S-CSCF Serving Call Session Control Function Entity
  • I-CSCF Incoming Call Session Control Function Entity
  • the session control module 104 and the number translation database 102, as well as the interface between the session control module 116 and the number translation database 124, are both E1 interfaces.
  • the session control module 104 initiates a query request to the number translation database 102, which carries the E.164 number.
  • the number translation database 102 returns a query response to the session control module 104, which carries the query results.
  • the query result may be a group identifier obtained by translation. Or a message that the translation failed.
  • the E1 interface can be a Diameter protocol or the like. The same process can also exist between the session control module 116 and the number translation database 124.
  • the interface between the session control module 104 and the interworking selection policy module 106 is an S1 interface.
  • the session control module 104 sends the session request to the interworking selection policy through the S1 interface.
  • Module 106 The S1 interface can be based on the SIP protocol or an internal interface protocol.
  • the interface between the session control module 116 and the interworking selection policy module 117 is also an S1 interface, and the information interaction process is the same as the information interaction process between the session control module 104 and the interworking selection policy module 116.
  • the interworking selection policy module 106 is configured to process the E.164 number analysis function to select an interworking outlet. In the present embodiment.
  • the interworking selection policy module 106 can be implemented by the BGCF.
  • the intercom selection policy module 106 based on the received session request, selects to send the tongue request to the E.164 heterogeneous network interworking module 108 or the interworking interface module 110 based on the called number (e.g., E.164 number analysis) policy.
  • the interworking selection policy module 106 queries the called number in the session request, that is, performs the analysis of the called number, determines the routing direction of the called number, and if it is determined that the called party is an E.164 heterogeneous network user, sends the session request to the corresponding The E.164 heterogeneous network interworking module 108; if it is determined that the called party is a non-calling home network user, that is, a cross-operator or a cross-regional user, the session request is sent to the corresponding interworking interface module 110.
  • the data required for querying the called number may be built in the interworking selection policy module 106 or in an external database.
  • the interworking selection policy module 106 can send the session request to different E.164 heterogeneous network interworking modules and different interworking interface modules based on the called number policy.
  • the interface between the interworking selection policy module 106 and the E.164 heterogeneous network interworking module 108 is an S2 interface, and the S2 interface may be based on a SIP protocol or an internal interface protocol.
  • the interface between the interworking selection policy module 106 and the interworking interface module 110 is an S3 interface, and the S3 interface may be based on a SIP protocol or an internal interface protocol.
  • the interworking selection policy module 118 in the called packet network has the same function as the interworking selection policy module 106 in the calling packet network, and the interworking interface module 122 and the E.164 heterogeneous in the called packet network.
  • the information interaction between the network interworking modules 120 is also the same as the information interaction in the calling packet network.
  • the called subscriber number in the session request received by the interworking selection policy module 118 is in the E.164 format, and may also initiate a query request to the number translation database 124, if the number translation database 124 returns the group identifier into which the E.164 number is translated. Then, the session request is sent to the tongue control module 116, otherwise it is sent to the E.164 heterogeneous network interworking module 120.
  • the interworking interface module 110 and the interworking interface module 122 send the received session request to the interworking interface module of another network; the interworking interface module 112 sends the session request from the interworking interface module 110 to the network.
  • the interface between the interworking interface module 110 and the interworking interface module 112 is an S4 interface, and the S4 interface may be based on a SIP protocol. In practical applications, the calling packet network and the called packet network may have multiple interworking interface modules.
  • the interworking interface module can also send session requests to the interworking interface modules of different networks based on the called number policy.
  • the interworking interface module 110, the interworking interface module 112, or the interworking interface module 122 may be an Interworking Border Control Function Entity (IBCF), a BGCF, or an I-CSCF.
  • IBCF Interworking Border Control Function Entity
  • the built-in number translation module 114 may initiate a query request to the number translation database 124, and the request carries the destination number in the E1.64 format.
  • the number translation database 124 returns the corresponding group identifier, and the number translation module 114 performs corresponding processing according to different packet identifiers: if it is the SIP URI of the IMS network, the number translation module 114 sends the session request to the other party through the S6 interface.
  • the module 114 sends to the interworking selection policy module 118 via the S5 interface. If the query fails, the number translation database 124 returns an E.164 number translation failure prompt message. The number translation module 114 sends the session request to the interworking selection policy module 118 through the S5 interface, and the S5 interface can be in the SIP protocol or the internal interface protocol.
  • the E.164 number translation request may also be initiated to an independent number translation module, and the latter may query the number translation database 124. .
  • the session request may be sent to the interworking selection policy module 118 or the session control module 116 without translation processing, and the interworking selection policy is performed.
  • the number translation module built into the module 118 or the session control module 116 performs translation processing.
  • the number translation module 114 can be built in any of the interworking interface module 112, the tongue control module 116, or the intercom selection policy module 118.
  • the number translation module 114 is configured to request an inquiry from the E.164 number to the number translation database 124 to translate into a corresponding group identifier. When the translation succeeds, the session request is sent to the session control module 116 or the interworking selection policy module according to different group identification policies. 118. Send a session request to the interworking selection policy module 118 when the translation fails.
  • the interface between the number translation module 114 and the number translation database 124 is an E2 interface, and the E2 interface may be a Diameter protocol or the like.
  • the number translation module 114 can also be an independent network element.
  • the session control module 116, or the interworking selection policy module 118 the E.164 number translation request is initiated to the number translation module 114.
  • the number translation module 114 requests the number translation database 124 to translate the E.164 number of the called user into a group identification.
  • the interworking selection policy module 118 in the called packet network is slightly different from the interworking selection policy module 106 in the calling packet network, and the destination number received by the interworking selection policy module 118 can be in the E.164 format. It may be a non-IMS user group identifier, that is, a packet identifier supported by an E.164 heterogeneous network, such as a softswitch network, a packet identifier in an H.323 network, and the interworking selection policy module 118 sends a session request to the called number policy based on the called number policy. Corresponding E.164 heterogeneous network interworking module 120 or interworking interface module 122.
  • the E.164 heterogeneous network interworking module 108 and the E.164 heterogeneous network interworking module 120 are modules that interwork with different E.164 heterogeneous networks (such as a traditional circuit domain network, an H.323 network, a softswitch network, etc.). .
  • the E.164 heterogeneous network interworking module 108 (the E.164 heterogeneous network interworking module 120) may be a Media Gateway Control Function Entity (MGCF), an IBCF, or an IBCF Interworking Function (IFF), etc.
  • MGCF Media Gateway Control Function Entity
  • IBCF IBCF Interworking Function
  • the policy module 106 (intercommunication selection policy module 118) can be connected through SIP and connected to different E.164 heterogeneous networks through protocols supported by heterogeneous networks, such as the Integrated Services Digital Network User Part (ISUP) protocol, H.323 protocol, etc.
  • the calling packet network or the called packet network may have multiple E.164 heterogeneous network interworking modules, such as a circuit domain interworking module, an H.323 interworking module, and a softswitch interworking module, which are respectively interoperable with different E.164 heterogeneous networks. .
  • the biggest difference from the current IMS standard is that when the session request arrives at the called packet network, if the destination number in the received session request is in the E.164 format, It is also required to initiate an E.164 number translation request by the number translation module of the called packet network. If the translation is successful and the called party is an IMS user, the session control module is entered for subsequent processing; if the translation is successful and is E.164 For a heterogeneous network user, the called party is an E.164 heterogeneous network user, and then enters the E.164 heterogeneous network interworking module for subsequent processing.
  • the session request can reach the E.164 heterogeneous network interworking module from the interworking selection policy module, and can also reach the interworking interface module.
  • the reason for the latter case is: the calling packet network
  • the selected called packet network may not necessarily be the home network of the called user (ie, the called landing network), but a tandem network, and also through the tandem network to reach the called subscriber's home network. For example, if a Chinese user calls a user of US carrier A, the Chinese network may not be able to directly select the carrier A's network. Network, but can only choose to connect to an international tandem network in the United States, and then choose the network of operator A through this international tandem network.
  • the calling party selects the number analysis policy of the policy module to transmit the session request to the called user number.
  • the calling packet network may also not analyze the E.164 number, but send the session request to the called packet network corresponding to the called subscriber number, and perform subsequent processing such as number analysis and translation by the called packet network.
  • the session control module of the calling packet network requests to query the destination number in the E.164 format.
  • the domain name of the network where the destination number is located may be obtained, such as a session request.
  • the destination number is "001-212-5552222".
  • the domain name "home.net” of the network where the number is located can be queried.
  • the network can also forward the session request to the network where the domain name is located or the corresponding E.164 heterogeneous network interworking module through the interworking interface module.
  • the interworking selection policy module 106 can also be considered to be located in the control module 104.
  • the interworking selection policy module 106 determines the direction of routing to the called user according to the domain name of the network where the called user is located. If the called subscriber number in the session request received by the interworking selection policy module 118 in the called packet network is a packet identifier supported by the E.164 heterogeneous network, the interworking selection policy module 118 may also determine the direction according to the packet identifier. The direction in which the called user is routed.
  • the interworking selection policy module determines the direction to be routed to the called user according to the called number policy, and may be sent to the corresponding E.164 heterogeneous network interworking module or the interworking interface module, or sent to the called packet network.
  • the packet network is further determined to determine the direction of the route, and the policy basis may be an E.164 number, or a network domain name of the called user.
  • the interworking interface module exists for the exit and the entrance of the network, if The network does not need to set such an in/out gateway, and the session request sent by the calling packet network to the called packet network may not pass through the interworking interface module.
  • FIG. 2 is a flowchart of a method for addressing an inter-domain packet according to an embodiment of the present invention, which specifically includes the following steps:
  • Step S202 the calling packet network converts the called number in the E.164 format in the received session request through the number translation database 102, and if the conversion fails, the called number of the called number in the E.164 format is carried.
  • the request is sent to the called packet network.
  • Step S204 the called packet network converts the called number in the E.164 format in the session request into a packet identifier by using the number translation database 104. If the conversion is successful and the called party is an IMS user, the session control in the called packet network is performed. The module performs subsequent processing. If the conversion is successful and the called party is an E.164 heterogeneous network user or the conversion fails, the E.164 heterogeneous network interworking module or the interworking interface module in the called packet network performs subsequent processing.
  • step S202 when the conversion fails, the session request is sent to the interworking selection policy module in the calling packet network, and the interworking selection policy module sends the session request to the called packet network according to the called number policy, that is, E.164 Construct a network interworking module or an interworking interface module.
  • the called number policy is at least one of the following: E.164 number, the network name of the called party.
  • a conversion request can be initiated to the number translation database by the number translation module.
  • the number conversion module is built into one of the following modules: Interworking interface module, session control module, and interworking selection policy module in the called packet network.
  • the number translation module can also be a separate module in the called packet network.
  • the calling user initiates a session request to the called user through the E.164 number, and the process of translating the E.164 number in the session request into the packet identifier is placed in the called packet network.
  • the process of translating the E.164 number in the session request into the packet identifier is placed in the called packet network.
  • it greatly increases the possibility of successful translation, so as to make the correct route.
  • the calling packet network and the called packet network described in the foregoing embodiments are relatively speaking.
  • Packet network the packet domain that directly connects the called user is the called packet network.
  • the packet network In the indirect continuation of the packet domain, it is the called packet network for the packet domain before it, and it is the calling packet network for the packet domain after it.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

L'invention concerne un réseau de sous-systèmes multimédia IP. Ledit réseau comprend : un réseau à commutation par paquets appelants et un réseau à commutation par paquets appelés. Le réseau à commutation par paquets appelants envoie une demande de session contenant un numéro d'appel en format E.164 au réseau à commutation par paquets appelés, ledit réseau traduisant le numéro appelé en format E.164 en un identificateur de paquet et acheminant la demande de session en fonction du résultat de la traduction. L'invention concerne également un procédé de routage dans un réseau IMS. Selon le réseau et le procédé, du fait que l'équipement appelantlance une demande de session à l'équipement appelé au moyen du numéro E.164 et que le réseau à commutation par paquets appelés traduit le numéro E.164 en un identificateur de paquet correspondant, le routage est exécuté de manière précise et les performances du système sont améliorées.
PCT/CN2007/070129 2006-06-19 2007-06-18 Réseau ims et procédé de routage dans un réseau ims WO2008000176A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN200610082888.3 2006-06-19
CN200610082888 2006-06-19
CN 200610112255 CN101094172A (zh) 2006-06-19 2006-08-29 分组域间寻址系统和方法
CN200610112255.2 2006-08-29

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WO2008000176A1 true WO2008000176A1 (fr) 2008-01-03

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PCT/CN2007/070129 WO2008000176A1 (fr) 2006-06-19 2007-06-18 Réseau ims et procédé de routage dans un réseau ims

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WO (1) WO2008000176A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113497764A (zh) * 2021-08-02 2021-10-12 中国电信股份有限公司 业务路由方法、系统、计算机存储介质和电子设备

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103703803B (zh) * 2013-08-26 2018-07-31 华为技术有限公司 一种网络设备寻址方法、设备及系统

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040184435A1 (en) * 2001-06-20 2004-09-23 Ilkka Westman System, device and method for providing call forwarding in dual subscription mode
US20060077965A1 (en) * 2004-10-07 2006-04-13 Nokia Corporation Callback services in a communication system
CN1773967A (zh) * 2004-11-08 2006-05-17 华为技术有限公司 通过分组域为电路域用户提供业务的方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040184435A1 (en) * 2001-06-20 2004-09-23 Ilkka Westman System, device and method for providing call forwarding in dual subscription mode
US20060077965A1 (en) * 2004-10-07 2006-04-13 Nokia Corporation Callback services in a communication system
CN1773967A (zh) * 2004-11-08 2006-05-17 华为技术有限公司 通过分组域为电路域用户提供业务的方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113497764A (zh) * 2021-08-02 2021-10-12 中国电信股份有限公司 业务路由方法、系统、计算机存储介质和电子设备

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