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US20040187021A1 - Mobile network having IP multimedia subsystem (IMS) entities and solutions for providing simplification of operations and compatibility between different IMS entities - Google Patents

Mobile network having IP multimedia subsystem (IMS) entities and solutions for providing simplification of operations and compatibility between different IMS entities Download PDF

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US20040187021A1
US20040187021A1 US10/767,072 US76707204A US2004187021A1 US 20040187021 A1 US20040187021 A1 US 20040187021A1 US 76707204 A US76707204 A US 76707204A US 2004187021 A1 US2004187021 A1 US 2004187021A1
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ims
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cscf
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US10/767,072
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English (en)
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Juha Rasanen
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Nokia Inc
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Individual
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Priority to US10/767,072 priority Critical patent/US20040187021A1/en
Assigned to NOKIA CORPORATION reassignment NOKIA CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: RASANEN, JUHA A.
Priority to EP04709667A priority patent/EP1593275A4/en
Priority to PCT/IB2004/000334 priority patent/WO2004071104A2/en
Priority to ES10177782.9T priority patent/ES2674720T3/es
Priority to CN2004800070210A priority patent/CN1998182B/zh
Priority to JP2006500318A priority patent/JP4163734B2/ja
Priority to RU2005128287/09A priority patent/RU2314657C2/ru
Priority to KR1020057014673A priority patent/KR100744093B1/ko
Priority to EP10177782.9A priority patent/EP2257027B1/en
Priority to CA2515412A priority patent/CA2515412C/en
Publication of US20040187021A1 publication Critical patent/US20040187021A1/en
Priority to US11/156,479 priority patent/US9084233B2/en
Abandoned legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/12—Setup of transport tunnels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/10—Architectures or entities
    • H04L65/1016—IP multimedia subsystem [IMS]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/1066—Session management
    • H04L65/1073—Registration or de-registration
    • 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
    • H04L65/1101—Session protocols
    • H04L65/1104—Session initiation protocol [SIP]
    • 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
    • H04L65/80—Responding to QoS
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/06—Authentication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/08—Upper layer protocols
    • H04W80/10—Upper layer protocols adapted for application session management, e.g. SIP [Session Initiation Protocol]

Definitions

  • the present invention relates to mobile networks including different IP Multimedia Subsystem (IMS) entities, and more particularly, relates to solutions for providing simplification of required policy control operations and compatibility between IMS entities based on different release specifications within mobile networks.
  • IMS IP Multimedia Subsystem
  • Modern mobile networks such as those networks standardized by 3GPP (3 rd Generation Partnership Project) specifications including all GSM (Global System for Mobile Communications) and 3 rd generations of GSM networks, are seamless integration of digital cellular networks and personal communications systems to provide telecommunication services including, for example, mobile data network services and IP multimedia services.
  • 3GPP 3 rd Generation Partnership Project
  • GSM Global System for Mobile Communications
  • 3 rd generations of GSM networks are seamless integration of digital cellular networks and personal communications systems to provide telecommunication services including, for example, mobile data network services and IP multimedia services.
  • Each 3GPP system may include a core network and a radio access network infrastructure using General Packet Radio Service (GPRS) and Enhanced Data Rates for Global Evolution (EDGE) technologies or supporting Universal Terrestrial Radio Access (UTRA) operable in both Frequency Division Duplex (FDD) and Time Division Duplex (TDD).
  • the core network (CN) may be logically divided into circuit switched (CS) and packet switched (PS) domains with CN entities provided for user traffic and related signaling, and an IP Multimedia Subsystem (IMS) with CN entities provided for IP multimedia services.
  • CS circuit switched
  • PS packet switched
  • IMS IP Multimedia Subsystem
  • Some CN entities such as Home Subscriber Server (HSS), Home Location Register (HLR), Authentication Center (AuC), Visitor Location Register (VLR), and Equipment Identify Register (EIR) may be common to the PS and CS domains, while other CN entities such as Mobile Switching Center (MSC) and Gateway MSC are specific to the CS domain to handle circuit switched services to/from mobile stations, and Gateway GPRS (general packet radio service) Support Node (GGSN) and Serving GSN (SGSN) are specific to the PS domain to handle the packet transmission to/from the mobile stations.
  • HSS Home Subscriber Server
  • HLR Home Location Register
  • AuC Authentication Center
  • VLR Visitor Location Register
  • EIR Equipment Identify Register
  • IMS entities such as Call Session Control Function (CSCF)
  • CSCF Call Session Control Function
  • PDP Packet Data Protocol, e.g., IP
  • CSCF can act as Proxy CSCF (P-CSCF) to serve as a first contact point for a user equipment (UE) (i.e., device allowing a user to access to network services, such as, a mobile station) within the IP multimedia subsystem (IMS), Serving CSCF (S-CSCF) to handle session states in the network, or an Interrogating CSCF (I-CSCF) to serve as a contact point within an operator's network for all IMS connections destined to either a subscriber of that network operator or a roaming subscriber in a given service area.
  • P-CSCF Proxy CSCF
  • UE user equipment
  • IMS IP multimedia subsystem
  • S-CSCF Serving CSCF
  • I-CSCF Interrogating CSCF
  • PDF Policy Decision Function
  • P-CSFC Proxy CSFC
  • the PDF is used to generate a set of binding information to bind the IMS level and the GPRS bearer level of an IMS session, and send the binding information to the GGSN, via the user equipment (UE).
  • UE user equipment
  • the GGSN searches PDF address from the set of binding information received from the UE, identifies the correct PDF and verifies that the PDP context operations requested by the UE comply with the preceding negotiation on the IMS level; see also, and 3GPP TS 23.207 V.5.6.0 (December 2002) “End-To-End Quality of Service (QoS) Concept and Architecture”, Release 5; and 3GPP TS 29.208 V.5.2.0 (December 2002) “End-To-End Quality of Service (QoS) signaling flows”, Release 5.
  • QoS Quality of Service
  • the UE may send/receive several session setup or modification requests (SIP INVITE) and can set up (or modify) one PDP context for several IMS sessions. If there are more than one PDFs in the core network (CN), the P-CSCF may send the authorization requests of different sessions to different PDFs.
  • PDP Packet Data Protocol, e.g., IP
  • the GGSN will only search one PDF address from the sets of binding information received from the UE, and send all sets of binding information to the same PDF. Some sets of binding information may be sent to wrong PDFs, which leads to reject decisions.
  • a PDP context modification may be directed by the P-CSCF to a different PDF than that used at the activation of the PDP (Packet Data Protocol, e.g., IP) context.
  • the GGSN may reject the PDP context modification request when noticing that the PDF address in the request received from the UE differs from the PDF address in the stored set of binding information. Furthermore, when several IMS sessions use the same PDP (Packet Data Protocol, e.g., IP) context, the GGSN cannot handle a modification request for some but not all IMS sessions within a single PDP (Packet Data Protocol, e.g., IP) context.
  • PDP Packet Data Protocol, e.g., IP
  • Various aspects of the present invention are directed to solutions for simplifying operations at IP Multimedia subsystem (IMS) entities in a mobile network and for providing compatibility between IP Multimedia subsystem (IMS) entities in a mobile network based on different Releases of a given 3GPP specification.
  • IMS IP Multimedia subsystem
  • an IP Multimedia Subsystem (IMS) architecture for IP multimedia services comprises a given user equipment (UE); a gateway support node (GGSN) configured to handle packet transmission to/from the given UE; and a proxy call session control function (P-CSCF) configured to serve as a first contact point of the UE and provide session management services, including establishing a packet data protocol (PDP) context for IMS related signaling, registration, and other procedures for IMS sessions.
  • UE user equipment
  • GGSN gateway support node
  • P-CSCF proxy call session control function
  • the P-CSCF is further configured to perform the following: storing identification information from the given UE during registration in memory; receiving a SIP (Session Initiation Protocol) message from the given UE; comparing identity in the SIP message with the identification information stored with a link to a Policy Decision Function (PDF); and using the same PDF for all operations of the given UE, when the identity in the SIP messages matches the identification information stored in memory.
  • SIP Session Initiation Protocol
  • PDF Policy Decision Function
  • a Policy Decision Function is configured to determine if one or more IP Multimedia subsystem (IMS) sessions in a PDP (Packet Data Protocol) context are modified, and when one or more IMS sessions in a PDP context are modified, send an aggregate authorization decision including both modified sessions and non-modified sessions per PDP context for policy enforcement
  • a computer readable medium which comprises instructions that, when executed by a mobile network, perform Proxy Call State Control Function (P-CSCF) in a mobile network, including: storing identification information from a given user equipment (UE) at registration in memory; receiving a SIP (Signal Initiated Protocol) message from the given UE; comparing identity in the SIP message with the identification information stored with a link to a Policy Decision Function (PDF); and using the same PDF for all operations of the given UE, when the identity in the SIP messages matches the identification information stored in memory.
  • P-CSCF Proxy Call State Control Function
  • FIG. 1 illustrates an example network system architecture for providing telecommunication services including IP multimedia services according to the 3GPP Specification, Release 5;
  • FIG. 2 illustrates an example interface architecture of IMS functional entities according to the 3GPP Specification, Release 5;
  • FIG. 3 illustrates an example interface architecture of IMS functional entities currently being planned for the 3GPP Specification, Release 6;
  • FIG. 4 illustrates an example interface architecture of IMS functional entities according to an embodiment of the present invention
  • FIG. 5 illustrates an example flowchart implementation at Proxy-CSCF (P-CSCF) for providing simplification of operations at IMS entities and compatibility between IMS entities in a mobile network according to an embodiment of the present invention
  • FIG. 6 illustrates an example flowchart implementation at Policy Decision Function (PDF) for providing simplification of operations at IMS entities and compatibility between IMS entities in a mobile network according to an embodiment of the present invention.
  • PDF Policy Decision Function
  • the present invention is applicable for use with all types of mobile networks including 2 nd and 3 rd generations of GSM (Global System for Mobile Communications) networks, transit networks such as Internet, Intranets, local area networks (LANs) and ATM based transit networks, and terminating networks such as public switched telephone networks (PSTNs), ISDNs, IP networks/LANs, X.25 and Public Land Mobile Networks (PLMNs) and interconnected systems and related protocols used for voice, message, data and image transfers between systems in such mobile networks.
  • GSM Global System for Mobile Communications
  • transit networks such as Internet, Intranets, local area networks (LANs) and ATM based transit networks
  • terminating networks such as public switched telephone networks (PSTNs), ISDNs, IP networks/LANs, X.25 and Public Land Mobile Networks (PLMNs) and interconnected systems and related protocols used for voice, message, data and image transfers between systems in such mobile networks.
  • PSTNs public switched telephone networks
  • ISDNs ISDNs
  • IP networks/LANs IP networks/LAN
  • GPRS technology is used in GSM networks to enable users to connect at higher data rates and make applications such as wireless email and Web-browsing easier and more useful.
  • EDGE is used to further boost the data speeds and allow video and mobile multimedia applications with data rates as high as 473 kbps.
  • IMS IP Multimedia Subsystem
  • the network system architecture 100 may broadly include, for example, an originating user equipment (UE) 110 , a terminating user equipment (UE) 120 or vice versa, and a communication link 130 arranged to connect the user equipments (UEs) 110 / 120 and may span over a single network or different networks such as, for example, a Public Land Mobile Network (PLMN) 132 , one or more transit networks 134 and a terminating network 136 .
  • PLMN Public Land Mobile Network
  • the user equipment (UE) 110 / 120 may be any device or user terminal to allow a user to access to network services, including, for example, a remote server or a mobile station (MS) for GSM as defined in 3GPP TS 24.002, V5.0.0 (December 2001), Release 5.
  • MS mobile station
  • Each UE 110 / 120 may include, for example, a mobile termination (MT) 112 , a terminal equipment (TE) 114 , and a terminal adaptation function (TAF) 116 arranged to perform radio transmission and related functions, and may contain end-to-end applications to support telecommunication services.
  • MT mobile termination
  • TE terminal equipment
  • TAF terminal adaptation function
  • the transit network 134 may include, but not limited to, Internet, Intranet, a local area network (LAN) or an ATM based transit network.
  • the terminating network 136 may include, but not limited to, a public switched telephone network (PSTN), an ISDN, an IP network/LAN, X.25 or another Public Land Mobile Network (PLMN).
  • PSTN public switched telephone network
  • ISDN ISDN
  • IP network/LAN IP network/LAN
  • X.25 X.25
  • PLMN Public Land Mobile Network
  • FIG. 2 illustrates an example interface architecture of IMS functional entities in mobile networks according to the 3GPP Specification, Release 5.
  • the Gateway GPRS (general packet radio service) Support Node (GGSN) 210 and the Proxy Call Session Control Function (P-CSCF) 220 represent network entities that are part of the core network (CN), for example, the PLMN 132 as shown in FIG. 1.
  • GGSN 210 may be used to handle the packet transmission to/from the UE 110 / 120 (e.g., mobile stations).
  • P-CSFC 220 may be used to serve as a first contact point for a given UE 110 / 120 and to provide session management services and CSCF related procedures, including establishing PDP (Packet Data Protocol, e.g., IP) context for IP multimedia subsystem (IMS) related signaling, registration and other procedures for IMS sessions.
  • PDP Packet Data Protocol, e.g., IP
  • IMS IP multimedia subsystem
  • a Policy Decision Function (PDF) 222 is integrated into P-CSCF 220 to supervise an IMS session when the UE 110 issues or receives a SIP (Session Initiation Protocol) message containing SDP (Session Description Protocol) signaling to negotiate parameters for an IMS session, make policy decisions based on the IMS session and media related information obtained from the P-CSCF 220 , and then exchange decision information with the GGSN 210 via a Go interface, as set forth in the 3GPP TS 29.207 V.5.2.0 (December 2002) “Policy Control over Go Interface”, Release 5.
  • PDP Packet Data Protocol
  • the PDF 222 is used to generate a set of binding information (especially, an authorization token) to bind the IMS level and the GPRS bearer level of an IMS session, and send the binding information to the GGSN 210 , via the user equipment (UE) 110 .
  • Binding information associates a PDP (Packet Data Protocol, e.g., IP) context with one or more media components (IP flows) of an IMS session, and is used by the GGSN 210 to request Service-based local policy (SBLP) information from the PDF 222 .
  • PDP Packet Data Protocol
  • IP flows media components
  • SBLP Service-based local policy
  • one or more flow identifiers (which may be added by the UE 110 after receiving the binding information from the P-CSCF/PDF) used by the UE 110 , GGSN 210 and PDF 222 to uniquely identify the IP media flow(s) associated with the SIP session.
  • the GGSN 210 Upon receipt of such binding information, the GGSN 210 is then used to search PDF address from the set of binding information (from the authorization token) received from the UE 110 , identify the correct PDF and verify that the PDP context operations requested by the UE 110 comply with the preceding negotiation on the IMS level.
  • the Policy Enforcement Point (PEP) 211 is a logical entity that communicates with the PDF regarding Service-based local policy (SBLP) control.
  • SBLP Service-based local policy
  • the GGSN 210 sends requests to and receives decisions from the PDF 222 .
  • the GGSN 210 may cache the policy decision data of the PDF decisions that may be used later for a local policy decision allowing the GGSN 210 to make policy control decision about the quality of service (QoS) authorization for PDP context modifications without requiring additional interaction with the PDF 222 .
  • QoS quality of service
  • the PEP functionalities for SBLP in the GGSN are described in, and incorporated by reference herein, the 3GPP TS 29.207 V.5.2.0 (December 2002) “Policy Control over Go Interface”, Release 5 and, hence, need not be repeated herein.
  • Both the UE 110 and the GGSN 210 may also include mechanisms for managing IP quality of service (QoS) end-to-end functions and related signaling flows as described in, and incorporated by reference herein, the 3GPP TS 23.207 V.5.6.0 (December 2002) “End-To-End Quality of Service (QoS) Concept and Architecture”, Release 5, and the 3GPP TS 29.208 V.5.2.0 (December 2002) “End-To-End Quality of Service (QoS) signaling flows”, Release 5.
  • QoS IP quality of service
  • the UE 110 may include a client application 111 , an IP bearer service (BS) manager 113 , a translation/mapping function 115 and, optionally, a UMTS bearer service (BS) manager 117 .
  • the GGSN 210 may also include an IP BS manager 213 , a translation/mapping function 215 and, optionally, an UMTS BS manager 217 .
  • IP BS managers 113 and 213 typically use standard IP mechanisms to manage IP bearer services.
  • the translation/mapping functions 115 and 215 provide inter-working between the mechanisms and parameters used within the UMTS bearer services and those used within the IP bearer services, and interact with the IP BS managers 113 and 213 .
  • UMTS BS managers 117 and 217 use standard UMTS mechanisms to manage UMTS (Universal Mobile Telecommunications System) bearer services and QoS management functions for UMTS bearer services.
  • UMTS BS managers 117 and 217 use standard UMTS mechanisms
  • FIG. 3 illustrates an example interface architecture of IMS functional entities currently being planned for the 3GPP Specification, Release 6.
  • PDF is no longer part of the P-CSCF 220 . Rather, the PDF is now implemented in a separate network element that is separate from the P-CSCF 220 .
  • a single P-CSCF 220 may be configured to use the services of several PDFs 222 A- 222 N, since several PDFs 222 A- 222 N may exist in the core network (CN). Moreover, several IMS sessions are allowed for a single PDP (Packet Data Protocol, e.g., IP) context since both the UE 110 and the PDF 222 are based on the plans for the 3GPP Specification, Release 6 (January 2003). As a result, the UE 110 may send/receive several session setup or modification requests (SIP INVITE) and can set up (or modify) one PDP context for several IMS sessions. If there are more than one PDFs 222 A- 222 N in the core network (CN), the P-CSCF 220 may send the authorization requests of different sessions to different PDFs 222 A- 222 N.
  • PDP Packet Data Protocol
  • the GGSN 210 will only search one PDF address from the sets of binding information received from the UE 110 , and send all sets of binding information to the same PDF. Some sets of binding information may be sent to wrong PDFs, which leads to reject decisions. Moreover, even if only a single-session per PDP (Packet Data Protocol, e.g., IP) context is used, a PDP context modification may be directed by the P-CSCF 220 to a different PDF than that used at the activation of the PDP (Packet Data Protocol, e.g., IP) context.
  • PDP Packet Data Protocol
  • the GGSN 210 may reject the PDP context modification request when noticing that the PDF address in the request received from the UE 110 differs from the PDF address in the stored set of binding information. Furthermore, when several IMS sessions use the same PDP (Packet Data Protocol, e.g., IP) context, the GGSN 210 cannot handle a modification request for some but not all IMS sessions within a single PDP (Packet Data Protocol, e.g., IP) context.
  • PDP Packet Data Protocol
  • IMS functional entities such as the UE 110 and PDF 222 , as shown in FIG. 3, are based on the 3GPP Specification, Release 6, and another set of functional entities such as the GGSN 210 as shown in FIG. 2, are based on the 3GPP Specification, Release 5, network equipments may not operate successfully.
  • PDP Packet Data Protocol, e.g., IP
  • the IMS functional entities are based on the same specification release, complicated operations are required at the GGSN 210 and at the PDF 222 , if sessions controlled by separate PDFs are multiplexed in the same PDP context, or if the PDP context activation and modification(s) are handled by different PDFs 222 A- 222 N.
  • the PDF 222 should be aware of the other sessions being multiplexed on the same PDP context and being handled by other PDFs, in order to be able to handle the session release and PDP context deactivation correctly.
  • the GGSN 210 should be able to combine the session based authorization decision from different PDFs 222 A- 222 N to form correct authorization information for the common PDP context.
  • the GGSN 210 should also maintain status information of each session, i.e., should be session aware instead of being just PDP context aware.
  • FIG. 4 an example interface architecture of IMS functional entities according to an embodiment of the present invention is illustrated.
  • the interface architecture as shown in FIG. 4 advantageously provides simplification of operations of IMS network entities and backward compatibility between various IMS entities in a mobile network based on different Releases of a given 3GPP specification, when multiple IMS sessions are executed over a single PDP context.
  • an algorithm 410 may be implemented as part of the P-CSCF 220 to ensure that the P-CSCF 220 will use the same PDF for all operations of a given UE 110 .
  • the GGSN 210 will always obtain only one and the same PDF address for all operations.
  • the GGSN 210 will always operate in compliance with other IMS entities such as UE 110 and P-CSCF 220 based on the 3GPP Specifciation, Release 6.
  • the operation of the GGSN 210 and the PDF is much simpler when there is no one-to-many relationship between the IMS entities.
  • the UE 110 is required for registration. Specifically, the UE 110 may send identification information to the S-CSCF (not shown), via the P-CSCF 220 . Such identification information may correspond to an IP address of the UE 110 and may be used in subsequent requests to/from the same UE 110 .
  • the P-CSCF 220 then stores the identification information received at the registration; see 3GPP TS 24.228 V.5.3.0 (December 2002) “Signalling Flows for the IP Multimedia Call Control Based on SIP and SDP”, Release 5.
  • the P-CSFC 220 may check the identification information in the SIP message, and compare the identity in the SIP message to stored identification information with a link to a PDF (i.e. the stored identity information leads to a certain PDF address).
  • the identification information may correspond to a pre-configured address range or URI range. Since the P-CSCF 220 knows all usable addresses of the PDFs 222 A- 222 N, e.g. through pre-configuration, the PDF addresses may be used either dynamically (e.g. when a given UE 110 registers, a certain PDF address is allocated to the UE 110 for the duration of the registration) or statically (e.g.
  • the GGSN 210 When the same PDF is used for all sessions of a PDP context, the GGSN 210 does not have to combine authorization decisions from different PDFs to obtain the final authorization for the PDP context, and the session release vs. PDP context deactivation is much simpler for the PDF 222 .
  • the PDF 222 may also be configured to send an aggregated authorization decision per PDP context to cover both the non-modified sessions and the modified sessions per PDP context, if only one or some of the IMS sessions in a PDP context are modified. This way the GGSN 210 does not have to handle parameters of separate IMS sessions and combine the changed and unchanged (stored) parameters to obtain the final authorized parameters for the PDP context.
  • FIG. 5 illustrates an example flowchart implementation at Proxy-CSCF (P-CSCF) for providing compatibility between IMS entities or simplification of GGSN and PDF operations according to an embodiment of the present invention.
  • the P-CSCF 220 may contain an algorithm 410 , shown in FIG. 4, which is activated to perform the followings:
  • the P-CSCF 220 stores identification information from a given UE 110 received at the registration in memory. Subsequently, the P-CSCF 220 receives a SIP message containing SDP information for an IMS session leading to PDF operations at block 520 , and then compares the identity in the SIP message with the identification information stored in memory with a link to a PDF 222 (i.e., stored identification information leads to a certain PDF address) at block 530 .
  • the P-CSCF 220 uses the same PDF for all operations of the given UE 110 at block 540 .
  • the P-CSCF 220 then performs other functions as requested by the SIP message at block 550 .
  • FIG. 6 illustrates an example flowchart implementation at Policy Decision Function (PDF) for providing compatibility between IMS entities or simplification of GGSN and PDF operations according to an embodiment of the present invention.
  • PDF Policy Decision Function
  • the PDF 222 may support multiple IMS sessions per a PDP context as set forth in the 3GPP Specification, Release 6. As shown in FIG. 6, the PDF 222 may be configured to perform the following:
  • the PDF 222 determines if one or more IMS sessions in a PDP context are modified. If one or more IMS sessions in a PDP context are modified, the PDF 222 sends an aggregated authorization decision per PDP context, covering both the non-modified sessions and the modified sessions per PDP context to the GGSN 210 for policy enforcement at block 620 . This way the GGSN 210 does not have to handle parameters of separate IMS sessions and combine the changed and unchanged (stored) parameters to obtain the final authorized parameters for the PDP context.
  • the network interface architecture provides compatibility between IP Multimedia subsystem (IMS) entities in a mobile network based on different Releases of a given 3GPP specification, while promoting simplification of operations at various IMS entities, such as GGSN and PDF operations.
  • IMS IP Multimedia subsystem

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  • Signal Processing (AREA)
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  • General Business, Economics & Management (AREA)
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US10/767,072 2003-02-10 2004-01-30 Mobile network having IP multimedia subsystem (IMS) entities and solutions for providing simplification of operations and compatibility between different IMS entities Abandoned US20040187021A1 (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
US10/767,072 US20040187021A1 (en) 2003-02-10 2004-01-30 Mobile network having IP multimedia subsystem (IMS) entities and solutions for providing simplification of operations and compatibility between different IMS entities
CA2515412A CA2515412C (en) 2003-02-10 2004-02-10 Mobile network having ip multimedia subsystem (ims) entities and solutions for providing simplification of operations and compatibility between different ims entities
CN2004800070210A CN1998182B (zh) 2003-02-10 2004-02-10 具有ip多媒体子系统(ims)实体的移动网络和用于提供操作的简化和不同ims实体间的兼容的解决方案
PCT/IB2004/000334 WO2004071104A2 (en) 2003-02-10 2004-02-10 Mobile network having ip multimedia subsystem (ims) entities and solutions for providing simplification of operations and compatibility between different ims entities
ES10177782.9T ES2674720T3 (es) 2003-02-10 2004-02-10 Servicios multimedia en un sistema de comunicación
EP04709667A EP1593275A4 (en) 2003-02-10 2004-02-10 MOBILE NETWORK COMPRISING ENTITIES OF MULTIMEDIA IP SUBSYSTEMS (IMS) AND SOLUTIONS FOR SIMPLIFYING OPERATIONS AND COMPATIBILITY BETWEEN DIFFERENT IMS ENTITIES
JP2006500318A JP4163734B2 (ja) 2003-02-10 2004-02-10 移動ネットワークにおいて実現されるプロキシコール状態制御機能部（ｐ−ｃｓｃｆ）、インターネットプロトコル（ｉｐ）マルチメディアサブシステム（ｉｍｓ）アーキテクチャ、移動ネットワークにおいてプロキシコール状態制御機能部（ｐ−ｃｓｃｆ）を実現するためのプロセス、およびコンピュータ読み取り可能な媒体
RU2005128287/09A RU2314657C2 (ru) 2003-02-10 2004-02-10 Мобильная сеть, имеющая объекты подсистемы ip мультимедиа (пим), и решения для обеспечения упрощения выполнения операций и совместимости между различными объектами пим
KR1020057014673A KR100744093B1 (ko) 2003-02-10 2004-02-10 다른 ｉｐ 멀티미디어 서브 시스템(ｉｍｓ) 엔티티들 간에동작의 간소화 및 호환성을 제공하기 위한 ｉｐ멀티미디어 서브시스템(ｉｍｓ) 엔티티 및 해결방법을구비하는 모바일 네트워크
EP10177782.9A EP2257027B1 (en) 2003-02-10 2004-02-10 Multimedia services in a communication system
US11/156,479 US9084233B2 (en) 2003-02-10 2005-06-21 Mobile network having IP multimedia subsystem (IMS) entities and solutions for providing simplification of operations and compatibility between different IMS entities

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US9084233B2 (en) 2015-07-14
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