WO2012051913A1 - Ims支持多时区的方法和系统及计费方法和系统 - Google Patents

Ims支持多时区的方法和系统及计费方法和系统 Download PDF

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Publication number
WO2012051913A1
WO2012051913A1 PCT/CN2011/080749 CN2011080749W WO2012051913A1 WO 2012051913 A1 WO2012051913 A1 WO 2012051913A1 CN 2011080749 W CN2011080749 W CN 2011080749W WO 2012051913 A1 WO2012051913 A1 WO 2012051913A1
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WIPO (PCT)
Prior art keywords
network element
time zone
zone information
layer network
pcscf
Prior art date
Application number
PCT/CN2011/080749
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English (en)
French (fr)
Inventor
骆旭剑
张玉
Original Assignee
中兴通讯股份有限公司
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 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to US13/880,047 priority Critical patent/US9215077B2/en
Priority to EP11833819.3A priority patent/EP2621201B1/en
Priority to CA2814973A priority patent/CA2814973C/en
Publication of WO2012051913A1 publication Critical patent/WO2012051913A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/14—Charging, metering or billing arrangements for data wireline or wireless communications
    • H04L12/1403—Architecture for metering, charging or billing
    • H04L12/1407—Policy-and-charging control [PCC] architecture
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/14—Charging, metering or billing arrangements for data wireline or wireless communications
    • H04L12/1485—Tariff-related aspects
    • 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
    • H04L65/1101—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
    • H04M—TELEPHONIC COMMUNICATION
    • H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
    • H04M15/10—Metering calls from calling party, i.e. A-party charged for the communication
    • H04M15/12—Discriminative metering, charging or billing
    • H04M15/22—Discriminative metering, charging or billing according to time of day
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2215/00—Metering arrangements; Time controlling arrangements; Time indicating arrangements
    • H04M2215/20—Technology dependant metering
    • H04M2215/208—IMS, i.e. Integrated Multimedia messaging Subsystem

Definitions

  • IMS supporting multi-time zone method and system and charging method and system
  • the present invention relates to 3rd Generation Partnership Project (3GPP) technology, and more particularly to a method and system for supporting multiple time zones and an accounting method and system for an IP Multimedia Subsystem (IMS, IP Multimedia Subsystem).
  • 3GPP 3rd Generation Partnership Project
  • IMS IP Multimedia Subsystem
  • IMS IP Multimedia Subsystem
  • a core network may cover users in multiple time zones in a country, as in the case of the United States. Therefore, the user equipment (UE, User Equipment), the access network node (Access Network Nodes), the IMS control layer network element, and the service layer network element are likely to be distributed in the same or different time zones.
  • the time zone information of the UE is of great significance to the operator's operation from the perspectives of billing, statistics, and quality of service (QoS) control.
  • the timestamp-related information in the message carrying of the IMS network architecture is a standard time letter in the UTC (Universal Time Coordinated) format, which is different from the profitable billing angle of the operator.
  • the time zone may correspond to different rates that can be allocated, and it is also possible to set a preferential rate period according to the time zone. Therefore, the time zone information of the UE is very important information for the operator from the perspective of billing and statistics.
  • the existing charging system defined in 3GPP includes two parts, offline and online charging.
  • Figure 1 shows the composition of the IMS off-line billing function entity and their relationship:
  • the Charging Trigger Function is embedded in the 3GPP IMS network elements, including the access layer network element, the control layer network element, and the service layer network element.
  • the main function is to monitor the network resources. Usage, collection of billing information, and through the Rf interface (Offline Charging Reference Point) is sent to the Charging Data Function (CDF).
  • the main function of the CDF is to receive the accounting request (ACR, Accounting Request) sent by the CTF, and construct it into a charging data record (CDR, Charging). Data Record), and sent to the Charging Gateway Function (CGF) through the Ga interface; the main function of the CGF is to store and manage the CDRs received from the CDF, and send the CDR files to the meter through the Bi interface.
  • Online charging is used to perform online credit control and statistical information reporting on the UE using network resources in real time.
  • OCS Online Charging System
  • SCSCF Serving Call Session Control Function
  • IMS network element interacts with the IMS network element through the Ro interface.
  • CCR Credit Control Request
  • CCA Credit Control Acknowledge
  • the IMS network element includes a Multimedia Resource Function Controller (MRFC) and an Application Server (AS, Application Server).
  • MRFC Multimedia Resource Function Controller
  • AS Application Server
  • 3GPP TS32.299 defines the relevant specifications for offline, online Diameter messages ACR/CCR, and TS32.298 defines the relevant specifications for CDR.
  • the CDR contains the calling and called number and the call start time.
  • the billing system (BS, Billing System) generally calculates the fee based on the user's talk time. These time information, taken from the Session Initiation Protocol (SIP) request time in ACR
  • SIP-Request-Timestamp and SIP-Response-Timestamp (AVP, Attribute Value Pairs) 0
  • AVP Attribute Value Pairs
  • the time zone information of the UE cannot be obtained from the definition of the existing 3GPP specifications.
  • Such a bill has defects in user billing, billing inquiry, settlement and reconciliation, etc., for example, when implementing the preferential period billing, it is required to follow User local time to calculate the discount, its statistics There is also an error in the information about the user's communication time point, which leads to a decrease in customer satisfaction and affects the operator's revenue.
  • the main object of the present invention is to provide a method and system for supporting multiple time zones in an IMS, which can transmit time zone information to each network element in an IMS, so that each network element obtains a time zone letter.
  • Another object of the present invention is to provide An IMS charging method and system can implement the local time of the user when the CDR carries the call, improve the accuracy of the charging, reduce the possibility of user complaints, and reduce the operator's revenue loss.
  • the invention provides a method for supporting multiple time zones by an IMS, the method comprising:
  • PCSCF Proxy Call Session Control Function
  • control layer network element After receiving the time zone information, the control layer network element that receives the SIP message carries the time zone information in a SIP message sent to the service layer network element;
  • the service layer network element receives the SIP message sent by the control layer network element, and obtains the time zone information carried by the SIP message.
  • the PCSCF network element carries the time zone information in the SIP message sent by the control layer network element except itself:
  • the PCSCF network element When the PCSCF network element trusts the information reported by the UE, when the UE reports the time zone information, the PCSCF network element carries the time zone information reported by the UE in the SIP message sent by the control layer network element except itself; The time zone information, if the access layer network element provides the time zone information, the PCSCF network element carries the time zone information provided by the access layer network element in the SIP message sent by the control layer network element except itself; The time zone information is not provided, and the PCSCF determines the time zone information of the UE, and carries the information in the SIP message sent by the control layer network element except itself. Time zone information;
  • the PCSCF does not trust the information reported by the UE
  • the PCSCF network element carries the time zone provided by the access layer network element in the SIP message sent by the control layer network element except itself.
  • Information When the access layer network element does not provide the time zone information, the PCSCF determines the time zone information of the UE, and carries the time zone information in the SIP message sent by the control layer network element except itself.
  • the time zone information is carried as: adding the time zone information to a P access network information (PANI) header of the sent SIP message.
  • PANI P access network information
  • the access layer network element provides the time zone information, which is: when the session is established or released, the access layer network element reports the learned UE time zone information to the PCC (Policy and Charging Control) architecture.
  • PCC Policy and Charging Control
  • the IMS provides a system for supporting multiple time zones, and the system includes: a PCSCF network element, a control layer network element other than the PCSCF, and a service layer network element;
  • a PCSCF network element configured to carry time zone information in a SIP message sent to a control layer network element, where the control layer network element is configured to receive the SIP message sent by the PCSCF network element, and obtain the time zone information, and then send the service to the service
  • the time zone information is carried in the SIP message sent by the layer network element
  • the service layer network element is configured to receive the SIP message sent by the control layer network element, and obtain the time zone information carried by the SIP message.
  • the system further includes: a UE, configured to report, to the PCSCF network element, a time zone access layer network element, configured to provide time zone information or location information of the UE to the PCSCF network element.
  • the PCSCF network element is specifically configured to: when the UE reports the time zone information, when the UE reports the time zone information, the time zone reported by the UE is sent in the SIP message sent by the control layer network element except itself. If the UE does not report the time zone information, if the access layer network element provides the time zone information, it is carried in the SIP message sent by the control layer network element except itself. Time zone information provided by the inbound network element; if the access layer network element does not provide time zone information, it determines itself
  • the access layer network element when the access layer network element provides the time zone information, the time zone information provided by the access layer network element is carried in the SIP message sent by the control layer network element except itself;
  • the inbound network element determines the time zone information of the UE, and carries the time zone information in the SIP message sent by the control layer network element except itself.
  • the IMS charging method provided by the present invention includes: the PCSCF network element carries time zone information in a SIP message sent by a control layer network element other than itself;
  • control layer network element After receiving the time zone information, the control layer network element that receives the SIP message carries the time zone information in a SIP message sent to the service layer network element;
  • the service layer network element receives the SIP message sent by the control layer network element, and obtains the time zone information carried by the SIP message;
  • Each network element that obtains the time zone information sends a charging request message carrying time zone information to the charging entity;
  • the charging entity performs charging processing according to the charging request message that carries the time zone information sent by each network element.
  • each network element that obtains the time zone information sends an accounting request message carrying the time zone information to the charging entity, where: in the offline charging system, the control layer network including the PCSCF is obtained.
  • the element and the service layer network element send the ACR message carrying the time zone information to the CDF.
  • the control layer network element and the service layer network element other than the PCSCF that obtain the time zone information send the CCR carrying the time zone information to the OCS. Message.
  • the charging entity performs charging processing according to the charging request message that carries the time zone information sent by each network element, and is: in the offline charging system, the charging request message sent by the charging entity from each network element.
  • the entity obtains valid information of the local time of the UE according to the charging request message that carries the time zone information sent by each network element, and performs online credit control and statistics according to the valid information.
  • the present invention provides an IMS charging system, which includes: a PCSCF network element, a control layer network element other than the PCSCF, a service layer network element, and a charging entity;
  • the PCSCF network element is configured to carry the time zone information in the SIP message sent to the control layer network element, and send the charging request message carrying the time zone information to the charging entity in the offline charging system;
  • the control layer network element is configured to receive the SIP message sent by the PCSCF network element, and obtain the time zone information, and then carry the time zone information in the SIP message sent to the service layer network element, and send the carried to the charging entity.
  • Billing request message for time zone information
  • a service layer network element configured to receive a SIP message sent by the control layer network element, obtain the time zone information carried by the SIP message, and send a charging request message carrying the time zone information to the charging entity;
  • the charging entity is configured to perform charging processing according to the charging request message sent by each network element.
  • the charging entity includes: a CDF in an offline charging system, or an OCS in an online charging system;
  • the charging request message includes an ACR message in an offline charging system or a CCR message in an online charging system.
  • the IMS provides a multi-time zone method and system, and a charging method and system.
  • the PCSCF network element carries time zone information in a SIP message sent by a control layer network element other than itself; a control layer network that receives the SIP message After obtaining the time zone information, the time zone information is carried in the SIP message sent to the service layer network element; the service layer network element receives the SIP message sent by the control layer network element, and obtains the location carried by the SIP message.
  • Time zone information can be in IMS
  • the time zone information is transmitted to each network element, so that each network element obtains the time zone information, and realizes the local time of the user when the CDR carries the call, improves the accuracy of the charging, reduces the possibility of user complaints, and reduces the operator's revenue loss.
  • FIG. 1 is a schematic structural diagram of an offline charging function entity in an existing 3GPP network
  • FIG. 2 is a schematic structural diagram of an online charging logic in an existing 3GPP IMS network
  • FIG. 3 is a schematic flowchart of a method for implementing an IMS supporting multiple time zones according to the present invention
  • FIG. 4 is a schematic structural diagram of a system for implementing an IMS supporting multiple time zones according to the present invention
  • FIG. 5 is a schematic flowchart of implementing an IMS charging method according to the present invention.
  • FIG. 6 is a schematic structural diagram of implementing an IMS charging system according to the present invention.
  • FIG. 7 is a schematic diagram of a network architecture according to Embodiments 1, 2, and 3 of the present invention.
  • FIG. 8 is a schematic flowchart of a method for a PCSCF to trust a report of a UE 41 to support multiple time zones and perform offline charging according to the first embodiment of the present invention
  • FIG. 9 is a schematic flowchart of a method for the IMS to support multiple time zones and perform offline charging by the PCSCF not trusting the reported information of the UE 41 according to the second embodiment of the present invention
  • FIG. 10 is a schematic flowchart of a method for the IMS to support multiple time zones and perform offline charging by the UE 41 and the access layer network element without providing time zone information according to Embodiment 3 of the present invention
  • FIG. 11 is a schematic diagram of a network architecture according to Embodiment 4 of the present invention.
  • FIG. 12 is a schematic flowchart of a method for the IMS to support multiple time zones and perform online charging by the PCSCF trusting the upper information of the UE 41 according to the fourth embodiment of the present invention
  • FIG. 13 is a schematic diagram of a PCC architecture defined in 3GPP based on Embodiments 5 and 6;
  • FIG. 14 is a schematic flowchart of a method for implementing an access layer network element to provide UE time zone information to a PCSCF during session establishment;
  • FIG. 15 is a schematic flowchart of a method for implementing an access layer network element to provide UE time zone information to a PCSCF when a session is released. detailed description
  • the PCSCF network element carries the time zone information in the SIP message sent by the control layer network element except itself; the control layer network element that receives the SIP message is in the SIP message sent to the service layer network element. Carrying the time zone information.
  • the present invention implements a method for supporting multiple time zones in an IMS. As shown in FIG. 3, the method includes the following steps:
  • Step 201 The PCSCF network element carries time zone information in a SIP message sent by a control layer network element other than itself.
  • the PCSCF network element trusts the information reported by the UE according to the configuration: when the UE reports the time zone information, the PCSCF network element carries the time zone information reported by the UE in the SIP message sent by the control layer network element except itself;
  • the PCSCF network element When the UE does not report the time zone information, if the access layer network element provides the time zone information, the PCSCF network element carries the time zone information provided by the access layer network element in the SIP message sent by the control layer network element except itself; The inbound layer network element does not provide the time zone information, and the PCSCF determines the time zone information of the UE, and carries the time zone information in the SIP message sent by the control layer network element except itself; wherein the PCSCF determines the time zone information of the UE, The PCSCF may map the corresponding time zone information according to the UE location information provided by the access layer network element.
  • the PCSCF replaces the time zone information reported by the UE with the time zone information provided by the access layer network element or the time zone information of the UE determined by the UE, even if the PCSCF receives the time zone information reported by the UE. Specifically:
  • the PCSCF network element When the PCSCF does not trust the information reported by the UE according to the configuration, when the access layer network element provides the time zone information, the PCSCF network element carries the access layer network element in the SIP message sent by the control layer network element except itself. Time zone information; when the access layer network element does not provide time zone information, the PCSCF determines the time zone information of the UE, and sends the SIP to the control layer network element other than itself. The message carries the time zone information; the PCSCF determines the time zone information of the UE, and the PCSCF may map the corresponding time zone information according to the UE location information provided by the access layer network element;
  • the carrying of the time zone information is generally: adding the time zone information to a P access network information (PANI, P-Access-Network-Info) header of the sent SIP message, where the added time zone information is generally Yes: adding a time zone information field to the access information part (access-info) of the PANI header, adding time zone information to the time zone information field;
  • PANI P access network information
  • access-info access information part
  • the access layer network element includes: a PS domain/EPC network element accessed by the 3GPP-UTRAN/EUTRAN, a session border controller (SBC), and an access gateway control function (AGCF, Access Gateway Control Function)
  • the evolved packet core network (EPC) network element includes a Policy and Charging Rules Function (PCRF), a Serving Gateway (S-GW), a Switching Gateway (P-GW), and a mobility management entity. (MME, Mobility Management Entity), etc.;
  • PCRF Policy and Charging Rules Function
  • S-GW Serving Gateway
  • P-GW Switching Gateway
  • MME Mobility Management Entity
  • the control layer network element other than itself may be an SCSCF, an ICSCF (Interrogating CSCF), an Exit Gateway Control Function (BGCF, Breakout Gateway Control Function), a Media Gateway Control Function (MGCF, Media Gateway Control Function), or the like.
  • SCSCF Session Control Function
  • ICSCF Interrogating CSCF
  • BGCF Exit Gateway Control Function
  • MGCF Media Gateway Control Function
  • Step 202 After receiving the time zone information, the control layer network element that receives the SIP message carries the time zone information in a SIP message sent to the service layer network element.
  • the time zone information is carried in the SIP message sent to the service layer network element.
  • the PANI header with the added time zone information is carried in the SIP message sent to the service layer network element, and the service layer network element Generally it is AS.
  • Step 203 The service layer network element receives the SIP message sent by the control layer network element, and obtains the time zone information carried in the network layer.
  • the obtaining the time zone information generally, obtaining the time zone information added in the PANI header carried by the SIP message.
  • the service layer network element in the IMS obtains the time zone information of the UE, It can achieve the purpose of supporting multiple time zones in IMS.
  • the present invention further provides a system for supporting multiple time zones in an IMS.
  • the system includes: a PCSCF network element 31, a control layer network element 32 other than the PCSCF, and a service layer network element 33;
  • the PCSCF network element 31 is configured to carry time zone information in the SIP message sent to the control layer network element 32.
  • the control layer network element 32 is configured to receive the SIP message sent by the PCSCF network element 31, and obtain the time zone information, and then carry the time zone information service layer network element 33 in the SIP message sent to the service layer network element 33. And receiving the SIP message sent by the control layer network element, and obtaining the time zone information carried by the SIP message;
  • the system includes a UE 34, configured to report time zone information to the PCSCF network element 31. Further, the system further includes an access layer network element, configured to provide time zone information or location information of the UE 34 to the PCSCF network element 31;
  • the PCSCF network element 31 carries the time zone information in the SIP message sent to the control layer network element 32, specifically:
  • the PCSCF network element 31 trusts the information reported by the UE 34 according to the configuration:
  • the PCSCF network element 31 carries the time zone information reported by the UE 34 in the SIP message sent to the control layer network element 32.
  • the PCSCF network element 31 When the UE 34 does not report the time zone information, if the access layer network element provides the time zone information, the PCSCF network element 31 carries the time zone information provided by the access layer network element in the SIP message sent to the control layer network element 32; The layer network element does not provide the time zone information, and the PCSCF network element 31 determines the time zone information of the UE 34, and carries the time zone information in the SIP message sent to the control layer network element 32. The PCSCF network element 31 determines the UE 34.
  • the time zone information may be that the PCSCF network element 31 maps the corresponding time zone information according to the location information of the UE 34 provided by the access layer network element; If the PCSCF network element 31 does not trust the information reported by the UE 34, the PCSCF network element 31 will use the time zone information provided by the access layer network element or the UE 34 determined by itself, even if the PCSCF network element 31 receives the time zone information reported by the UE 34.
  • the time zone information replaces the time zone information reported by the UE 34, which is specifically:
  • the PCSCF network element 31 does not trust the information reported by the UE 34
  • the PCSCF network element 31 carries the access layer network in the SIP message sent to the control layer network element 32.
  • the time zone information provided by the element when the access layer network element does not provide the time zone information, the PCSCF network element 31 determines the time zone information of the UE 34, and carries the time zone in the SIP message sent by the control layer network element 32 other than itself.
  • the PCSCF network element 31 determines the time zone information of the UE 34, and the PCSCF network element 31 may map the corresponding time zone information according to the location information of the UE 34 provided by the access layer network element.
  • the time zone information is generally carried in: adding time zone information in a PANI header of the sent SIP message, where the added time zone information is generally: adding a time zone information field in the access information part of the PANI header, and setting the time zone Information is added to the time zone information field;
  • the service layer network element 33 obtains the time zone information carried in the SIP message, and specifically: the service layer network element 33 obtains time zone information added in the PANI header carried by the SIP message.
  • the present invention also implements an IMS charging method. As shown in FIG. 5, the method includes the following steps:
  • Step 401 The PCSCF network element carries time zone information in a SIP message sent by a control layer network element other than itself.
  • the PCSCF network element trusts the information reported by the UE according to the configuration: when the UE reports the time zone information, the PCSCF network element carries the time zone information reported by the UE in the SIP message sent by the control layer network element except itself;
  • the PCSCF network element When the UE does not report the time zone information, if the access layer network element provides the time zone information, the PCSCF network element carries the access layer network element in the SIP message sent by the control layer network element except itself. Time zone information; if the access layer network element does not provide time zone information, the PCSCF determines the time zone information of the UE, and carries the time zone information in a SIP message sent by the control layer network element except itself; wherein, the PCSCF Determining the time zone information of the UE, where the PCSCF may map the corresponding time zone information according to the UE location information provided by the access layer network element;
  • the PCSCF replaces the time zone information reported by the UE with the time zone information provided by the access layer network element or the time zone information of the UE determined by the UE, even if the PCSCF receives the time zone information reported by the UE. Specifically:
  • the PCSCF network element When the PCSCF does not trust the information reported by the UE according to the configuration, when the access layer network element provides the time zone information, the PCSCF network element carries the access layer network element in the SIP message sent by the control layer network element except itself. Time zone information; when the access layer network element does not provide the time zone information, the PCSCF determines the time zone information of the UE, and carries the time zone information in a SIP message sent by the control layer network element except itself; the PCSCF determines the UE The time zone information may be that the PCSCF maps the corresponding time zone information according to the UE location information provided by the access layer network element;
  • the time zone information is generally carried in: adding time zone information in a PANI header of the sent SIP message, where the added time zone information is generally: adding a time zone information field in the access information part of the PANI header, and setting the time zone Information is added to the time zone information field;
  • the access layer network element includes: a PS domain/EPC network element accessed by the 3GPP-UTRAN/EUTRAN, an SBC, an AGCF, and the like;
  • control layer network elements other than itself may be SCSCF, ICSCF, BGCF, MGCF, and the like.
  • Step 402 After receiving the time zone information, the control layer network element that receives the SIP message carries the time zone information in a SIP message sent to the service layer network element.
  • the time zone information is carried in the SIP message sent to the service layer network element.
  • the PANI header with the added time zone information is carried in the SIP message sent to the service layer network element, and the service layer network element Generally it is AS.
  • Step 403 The service layer network element receives the SIP message sent by the control layer network element, and obtains the time zone information carried therein.
  • the obtaining the time zone information generally, obtaining the time zone information added in the PANI header carried by the SIP message.
  • Step 404 Each network element that obtains the time zone information sends a charging request message carrying time zone information to the charging entity.
  • the control layer network element and the service layer network element that obtain the time zone information send an ACR message carrying the time zone information to the CDF.
  • the time zone information is obtained.
  • the control layer network element and the service layer network element except the PCSCF send a CCR message carrying the time zone information to the OCS;
  • the control layer network element except the PCSCF includes the SCSCF, the MRCF, and the like;
  • the ACR message carrying the time zone information is generally added to the access network information (ANI, Access-Network-Information) AVP, and the ACR message carries the ANI AVP, which is referred to as the ANI mode; Or a new time zone AVP is added, and the time zone information is added to the newly added time zone AVP, and the ACR message carries the time zone AVP, which is referred to as the TZ mode;
  • Transmitting the CCR message carrying the time zone information generally, adding the time zone information to the ANI AVP, the CCR message carrying the ANI AVP; or adding a new time zone AVP, adding the time zone information to the newly added time zone AVP, CCR
  • the message carries the time zone AVP.
  • Step 405 The charging entity performs charging processing according to the charging request message that carries the time zone information sent by each network element.
  • the SIP-Response-Timestamp AVP sets the time field of the CDR corresponding to each network element to include the valid information of the local time of the UE, that is, the UTC time + time zone information of the UE.
  • the charging entity obtains valid information of the local time of the UE according to the charging request message that carries the time zone information sent by each network element, and performs online credit control and statistics according to the valid information.
  • the present invention further provides an IMS charging system.
  • the system includes: a PCSCF network element 51, a control layer network element 52 other than the PCSCF, a service layer network element 53, and a charging entity. 54; Among them,
  • the PCSCF network element 51 is configured to carry the time zone information in the SIP message sent to the control layer network element 52, and send the charging request message carrying the time zone information to the charging entity 54 in the offline charging system;
  • the control layer network element 52 is configured to receive the SIP message sent by the PCSCF network element 51, and obtain the time zone information, and then carry the time zone information in the SIP message sent to the service layer network element 53, and The entity 54 sends a charging request message carrying time zone information;
  • the service layer network element 53 is configured to receive the SIP message sent by the control layer network element, obtain the time zone information carried in the control layer, and send the charging request message carrying the time zone information to the charging entity 54; the charging entity 54, The charging process is performed according to the charging request message sent by each network element. Specifically, in the offline charging, the charging entity 54 obtains the time zone information from the charging request message sent by each network element, and combines UTC with UTC.
  • the time-format SIP-Request-Timestamp AVP sets the time field of the CDR corresponding to each network element to include the valid information of the local time of the UE; in the case of online charging, the charging entity 54 sends the information according to each network element.
  • the charging request message carrying the time zone information obtains valid information of the local time of the UE, and performs online credit control and statistics according to the valid information.
  • the charging entity 54 includes: a CDF in an offline charging system, or an OCS in an online charging system; the charging request message includes an ACR message in an offline charging system, or an online charging system. CCR message;
  • the sending the charging request message carrying the time zone information generally, adding the time zone information to the ANI AVP, and the ACR message carrying ANI AVP; or add a new time zone AVP to add time zone information to the newly added time zone
  • the ACR message carries the time zone AVP
  • the system includes a UE 55, configured to report time zone information to the PCSCF network element 51. Further, the system further includes an access layer network element, configured to provide the UE to the PCSCF network element 51.
  • Time zone information or location information of 55
  • the PCSCF network element 51 carries the time zone information in the SIP message sent to the control layer network element 52, which is specifically:
  • the PCSCF network element 51 trusts the information reported by the UE 55 according to the configuration:
  • the PCSCF network element 51 carries the time zone information reported by the UE 55 in the SIP message sent to the control layer network element 52.
  • the PCSCF network element 51 When the UE 55 does not report the time zone information, if the access layer network element provides the time zone information, the PCSCF network element 51 carries the time zone information provided by the access layer network element in the SIP message sent to the control layer network element 52; The layer network element does not provide the time zone information, and the PCSCF network element 51 determines the time zone information of the UE 55, and carries the time zone information in the SIP message sent to the control layer network element 52. The PCSCF network element 51 determines the UE 55.
  • the time zone information may be that the PCSCF network element 51 maps the corresponding time zone information according to the location information of the UE 55 provided by the access layer network element;
  • the PCSCF network element 51 does not trust the information reported by the UE 55, even if the PCSCF network element 51 receives the time zone information reported by the UE 55, the time zone information provided by the access layer network element or the UE 55 determined by itself is used.
  • the time zone information replaces the time zone information reported by the UE 55, which is specifically:
  • the PCSCF network element 51 does not trust the information reported by the UE 55
  • the PCSCF network element 51 carries the access layer network in the SIP message sent to the control layer network element 52.
  • the time zone information provided by the element when the access layer network element does not provide the time zone information, the PCSCF network element 51 determines the time zone information of the UE 55, and carries the time zone in the SIP message sent by the control layer network element 52 other than itself. Information; the PCSCF network element 51 determines the UE 55
  • the time zone information may be that the PCSCF network element 51 maps the corresponding time zone information according to the location information of the UE 55 provided by the access layer network element;
  • the time zone information is generally carried in: adding time zone information in a PANI header of the sent SIP message, where the added time zone information is generally: adding a time zone information field in the access information part of the PANI header, and setting the time zone Information is added to the time zone information field;
  • the service layer network element 53 obtains the time zone information carried in the SIP message, and specifically: the service layer network element 53 obtains time zone information added in the PANI header carried by the SIP message.
  • the UE 41 reports the time zone information
  • the PCSCF 42 trusts the reporting information of the UE 41 according to the configuration
  • the time zone 1 time zone 2 uses the ANI mode to carry the time zone information on the calling side (IMS-A).
  • IMS-A the calling side
  • Step 501 The UE 41 carries the PANI header with the added time zone information in the invitation (INVITE) request sent to the PCSCF 42;
  • the UE 41 extends the PANI header, adds a time zone information field in the access information part, adds the time zone information of its own to the time zone information field, and then carries the INVITE request sent to the PCSCF 42. Said PANI head.
  • Step 502 After receiving the INVITE request, the PCSCF 42 carries the PANI header with the added time zone information in the INVITE request sent to the SCSCF 43.
  • Step 503 After receiving the INVITE request sent by the PCSCF 42 and carrying the PANI header, the SCSCF 43 carries the PANI header in the INVITE request sent to the contracted AS 44.
  • Step 504 After receiving the INVITE request sent by the SCSCF 43 and carrying the PANI header, the AS 44 sends its own INVITE request to the SCSCF 43 and carries the PANI header.
  • Step 505 The SCSCF 43 sends an INVITE request carrying the PANI header to the called side network. Yuan
  • Step 506 The called side network element sends a 200 OK response to the SCSCF 43.
  • Step 507 The SCSCF 43 sends a 200 OK response to the AS 44.
  • Step 508 AS 44 replies with a 200 OK response to SCSCF 43;
  • Step 509 The AS 44 fills in the AM AVP according to the time zone information in the PANI header, and sends an ACR message carrying the AM AVP to the CDF 45.
  • Step 510 After receiving the ACR message sent by the AS 44, the CDF 45 opens an AS CDR.
  • the time field of the AS CDR is set to contain the valid information of the local time of the UE 41, that is, the UTC of the UE 41. Time + time zone information;
  • Step 511 The SCSCF 43 sends a 200 OK response to the PCSCF 42.
  • Step 512 The SCSCF 43 fills in the AM AVP according to the time zone information in the PANI header, and sends an ACR message carrying the AM AVP to the CDF 45;
  • Step 513 After receiving the ACR message sent by the SCSCF 43, the CDF 45 opens an SCSCF CDR, and according to the time zone information in the ACR, sets the time field of the SCSCF CDR to include the valid information of the local time of the UE 41.
  • Step 514 The PCSCF 42 sends a 200 OK response to the UE 41.
  • Step 515 The PCSCF 42 fills in the AM AVP according to the time zone information in the PANI header, and sends an ACR message carrying the AM AVP to the CDF 45;
  • Step 516 After receiving the ACR message sent by the PCSCF 42, the CDF 45 opens a PCSCF CDR, and according to the time zone information in the ACR, sets the time field of the PCSCF CDR to include the valid information of the UE 41 local time.
  • the UE 41 reports the time zone information
  • the access layer network element provides the time zone information to the PCSCF 42
  • the PCSCF 42 does not trust the reporting information of the UE 41.
  • Time-consuming, implementing the IMS charging method as shown in Figure 9, the method Including the following steps:
  • Step 601 The UE 41 carries or does not carry the time zone information in the INVITE request for sending the SIP to the PCSCF 42, and the access layer network element carries the time zone information in the INVITE request for sending the SIP to the PCSCF 42;
  • the INVITE request sent by the UE 41 or the access layer network element carries the time zone information, and specifically: the INVITE request sent by the UE 41 or the access layer network element carries the PANI header with the added time zone information.
  • Step 602 The PCSCF 42 carries the PANI header with the added time zone information in the INVITE request sent to the SCSCF 43 according to the INVITE request of the access layer network element.
  • the PCSCF 42 uses the PANI header containing the time zone information carried in the INVITE request of the access layer network element, because the PCSCF 42 does not trust the UE 41 to report the information according to the configuration, when the UE 41 sends the SIP INVITE request to carry the time zone information.
  • the INVITE request carries the PANI header containing the time zone information obtained from the INVITE request of the access layer network element.
  • Step 603 After receiving the INVITE request sent by the PCSCF 42 and carrying the PANI header, the SCSCF 43 carries the PANI header in the INVITE request sent to the contracted AS 44.
  • Step 604 After receiving the INVITE request sent by the SCSCF 43 to carry the PANI header, the AS 44 sends its own INVITE request to the SCSCF 43 and carries the PANI header.
  • Step 605 The SCSCF 43 sends an INVITE request carrying the PANI header to the called side network element.
  • Step 606 The called side network element sends a 200 OK response to the SCSCF 43.
  • Step 607 The SCSCF 43 sends a 200 OK response to the AS 44.
  • Step 608 AS 44 replies with a 200 OK response to SCSCF 43;
  • Step 609 The AS 44 fills in the ANI AVP according to the time zone information in the PANI header, and sends an ACR message carrying the ANI AVP to the CDF 45;
  • the time zone information of the UE 41 is carried in the manner of the extended PANI header, and corresponds to the ANI AVP in the charging message Diameter. If the time zone information of the UE 41 is carried in another manner, the AS 44 can also set the time zone of the UE 41. The information is added to the Diameter ACR message as a separate AVP message or the existing AVP in the extended ACR message is sent to the CDF 45.
  • Step 610 After receiving the ACR message sent by the AS 44, the CDF 45 opens an AS CDR. According to the time zone information in the ACR message, the time field of the AS CDR is set to contain the valid information of the local time of the UE 41, that is, the UE 41. UTC time + time zone information;
  • Step 611 The SCSCF 43 sends a 200 OK response to the PCSCF 42.
  • Step 612 The SCSCF 43 fills in the ANI AVP according to the time zone information in the PANI header, and sends an ACR message carrying the ANI AVP to the CDF 45;
  • the extended PANI header is used to carry the time zone information of the user. If carried in another manner, the SCSCF 43 may also add the time zone information of the UE 41 as a separate AVP to the Diameter ACR message or extend another ACR message. The existing AVP is sent to the CDF 45.
  • Step 613 After receiving the ACR message sent by the SCSCF 43, the CDF 45 opens an SCSCF CDR, and according to the time zone information in the ACR message, sets the time field of the SCSCF CDR to include the valid information of the UE 41 local time;
  • Step 614 The PCSCF 42 sends a 200 OK response to the UE 41.
  • Step 615 The PCSCF 42 fills in the ANI AVP according to the time zone information in the PANI header, and sends an ACR message carrying the ANI AVP to the CDF 45;
  • the PANI header is used to carry the time zone information of the user. If the time zone information is carried in another manner, the PCSCF 42 may also add the time zone information of the UE 41 as a separate AVP to the Diameter ACR message or extend another ACR message. The existing AVP is sent to CDF 45.
  • Step 616 After receiving the ACR message sent by the PCSCF 42, the CDF 45 opens a PCSCF CDR, and according to the time zone information in the ACR message, sets the time field of the PCSCF CDR to include the valid information of the local time of the UE 41.
  • the UE 41 and the access layer network element do not provide time zone information, and the PCSCF 42 determines the time zone information of the UE 41 according to the location information, and implements the IMS charging method when offline charging is performed.
  • the method includes the following steps:
  • Step 701 The UE 41 sends a SIP INVITE request to the PCSCF 42.
  • Step 702 After receiving the INVITE request, the PCSCF 42 carries the PANI header with the added time zone information in the INVITE request sent to the SCSCF 43.
  • the PCSCF maps the UE 41 in its own configuration table according to the location information of the UE 41 or the access layer network element, such as the tracking area (TA, Tracking Area) or the cell identifier Cell ID.
  • the time zone information is located, and the time zone information is added in the PANI header of the INVITE request sent to the SCSCF 43.
  • the configuration table on the PCSCF refers to the location information of the response UE and the corresponding UE where the operator is allowed to configure itself. A table of mapping relationships for time zone information.
  • Step 703 After receiving the INVITE request sent by the PCSCF 42 and carrying the PANI header, the SCSCF 43 carries the PANI header in the INVITE request sent to the contracted AS 44.
  • Step 704 After receiving the INVITE request sent by the SCSCF 43 and carrying the PANI header, the AS 44 sends its own INVITE request to the SCSCF 43 and carries the PANI header.
  • Step 705 The SCSCF 43 sends an INVITE request carrying the PANI header to the called side network element.
  • Step 706 The called side network element sends a 200 OK response to the SCSCF 43.
  • Step 707 The SCSCF 43 sends a 200 OK response to the AS 44.
  • Step 708 AS 44 replies with a 200 OK response to SCSCF 43;
  • Step 709 The AS 44 fills in the ANI AVP according to the time zone information in the PANI header, and sends an ACR message carrying the ANI AVP to the CDF 45;
  • the time zone information of the UE 41 is carried in the manner of the extended PANI header, and corresponds to the ANI AVP in the charging message Diameter. If carried in another manner, the AS 44 can also use the time zone information of the UE 41 as a separate AVP. The existing AVP added to the Diameter ACR message or extended in other ACR messages is sent to the CDF 45.
  • Step 710 After receiving the ACR message sent by the AS 44, the CDF 45 opens an AS CDR. According to the time zone information in the ACR message, the time field of the AS CDR is set to contain the valid information of the UE 41 local time, that is, the UE 41. UTC time + time zone information;
  • Step 711 The SCSCF 43 sends a 200 OK response to the PCSCF 42.
  • Step 712 The SCSCF 43 fills in the ANI AVP according to the time zone information in the PANI header, and sends an ACR message carrying the ANI AVP to the CDF 45;
  • the time zone information of the UE 41 is carried in the manner of extending the PANI header. If carried in another manner, the SCSCF 43 may also add the time zone information of the UE 41 as a separate AVP to the Diameter ACR message or extend another ACR. The existing AVP in the message is sent to CDF 45.
  • Step 713 After receiving the ACR message sent by the SCSCF 43, the CDF 45 opens an SCSCF CDR, and according to the time zone information in the ACR message, sets the time field of the SCSCF CDR to include the valid information of the UE 41 local time;
  • Step 714 The PCSCF 42 sends a 200 OK response to the UE 41.
  • Step 715 The PCSCF 42 fills in the ANI AVP according to the time zone information in the PANI header, and sends an ACR message carrying the ANI AVP to the CDF 45;
  • the time zone information of the UE 41 is carried in the manner of extending the PANI header. If carried in another manner, the PCSCF 42 may also use the time zone information of the UE 41 as a separate.
  • the AVP is added to the Diameter ACR message or the existing AVP in the extended ACR message is sent to the CDF 45.
  • Step 716 After receiving the ACR message sent by the PCSCF 42, the CDF 45 opens a PCSCF CDR, and according to the time zone information in the ACR message, sets the time field of the PCSCF CDR to include the valid information of the local time of the UE 41.
  • the UE 41 reports the time zone information, and the PCSCF trusts the UE's uplink information according to the configuration.
  • the time zone 1 time zone 2 time zone 3 is adopted by the calling side in the ANI mode.
  • the UE 41 (IMS-A) carries the time zone information.
  • the IMS charging method is implemented. As shown in FIG. 12, the method includes the following steps:
  • Step 801 The UE 41 sends a SIP INVITE request to the PCSCF 42, and carries a PANI header containing the UE 41 time zone information.
  • Step 802 After receiving the INVITE request, the PCSCF 42 carries the PANI header with the added time zone information in the INVITE request sent to the SCSCF 43;
  • the PCSCF 42 transparently transmits the PANI header of the added time zone information according to the time zone information that the configuration trusts the UE 41 to report, that is, carries the added time zone in the INVITE request sent to the SCSCF 43.
  • the PANI header of the information is not limited to the time zone information that the configuration trusts the UE 41 to report, that is, carries the added time zone in the INVITE request sent to the SCSCF 43.
  • Step 803 After receiving the INVITE request sent by the PCSCF 42 and carrying the PANI header, the SCSCF 43 carries the PANI header in the INVITE request sent to the contracted AS 44.
  • Step 804 After receiving the INVITE request sent by the SCSCF 43 and carrying the PANI header, the AS 44 sends its own INVITE request to the SCSCF 43 and carries the PANI header.
  • Step 805 The SCSCF 43 sends an INVITE request carrying the PANI header to the called side network element.
  • Step 806 The called side network element sends a 200 OK response to the SCSCF 43.
  • Step 807 The SCSCF 43 sends a 200 OK response to the AS 44.
  • Step 808 AS 44 replies with a 200 OK response to SCSCF 43;
  • Step 809 8 44 according to?
  • the time zone information in the ⁇ 1 header is filled in ⁇ [ ⁇ ?, and the CCR message carrying the ANI AVP is sent to the OCS 45;
  • the time zone information of the UE 41 is carried in the manner of the extended PANI header, and corresponds to the ANI AVP in the charging message Diameter. If carried in another manner, the AS 44 can also use the time zone information of the UE 41 as a separate AVP.
  • the existing AVP added to the Diameter CCR message or extended in other CCR messages is sent to the OCS 45.
  • Step 810 The OCS 45 obtains valid information of the local time of the UE 41 according to the time zone information in the CCR message, and performs online credit control and statistics according to the valid information.
  • Step 811 The SCSCF 43 sends a 200 OK response to the PCSCF 42.
  • Step 812 The SCSCF 43 sends an INVITE request carrying a PANI header to the IMS gateway function (IMS-GWF).
  • IMS-GWF fills in the ANI AVP according to the time zone information in the PANI header, and sends a CCR message carrying the ANI AVP to the OCS 45.
  • the time zone information of the UE 41 is carried in the manner of the extended PANI header, and corresponds to the ANI AVP in the charging message Diameter. If carried in another manner, the SCSCF 43 can also use the time zone information of the UE 41 as a separate AVP. The existing AVP added to the Diameter CCR message or extended in other CCR messages is sent to the OCS 45.
  • Step 813 The OCS 45 obtains valid information of the local time of the UE 41 according to the time zone information in the CCR message, and performs online credit control and statistics according to the valid information.
  • Step 814 The PCSCF 42 sends a 200 OK response to the UE 41.
  • the above is the embodiment of the initiating session of the calling party.
  • the processing of the time zone information of the UE in the terminal call process of other mobile stations is similar to that of the foregoing embodiment, and details are not described herein.
  • the time zone information is transmitted by using the extended PANI header.
  • Other ways of transmitting the time zone information include: separately adopting one information field or extending other fields to transmit the time zone information. Since some countries may only have one time zone, that is, there is no problem of deploying the core network across time zones, such as: countries in the EU, etc., the time zone information of the UE is transmitted between the networks in this case, according to the needs of local operators. Selected.
  • the following describes the process of providing the time zone information of the access layer network element to the PCSCF in the second embodiment by using the fifth and sixth embodiments.
  • the fifth and sixth embodiments are based on the PCC architecture defined in the 3GPP shown in FIG. 13, and the PCRF is based on the user.
  • the contract information of the subscription database SPR, Subscription Profile Repository
  • the service information delivered by the AF and the event information of the triggered charging policy and QoS change reported by the Bearing Binding and Event Report Function (BBERF, Bearing Binding and Event Report Function)
  • BBERF Bearing Binding and Event Report Function
  • the method for the access layer network element to provide the UE time zone information to the PCSCF through the PCC architecture is implemented. As shown in FIG. 14, the method includes the following steps:
  • Step 901 When the IMS session is established, the PCSCF authorizes the resources required for the session, and provides the service information to the PCRF to notify the PCRF to report the UE time zone information.
  • Step 902 When the PMIP-S5/S8 protocol is between the P-GW and the S-GW, the PCRF initiates a gating and QoS rule providing process and triggers the S-GW to allocate a dedicated bearer, and the S-GW responds in the gating and QoS rules.
  • the UE carries the UE time zone information provided by the MME.
  • the GTP-S5/S8 protocol is between the P-GW and the S-GW
  • the PCRF initiates a charging and QoS rule providing process and triggers the P-GW to allocate a dedicated bearer.
  • the P-GW is in the P-GW.
  • the charging and QoS rule response carries the UE time zone information provided by the MME.
  • the step includes the following steps:
  • Step 902-a The PCRF provides gating and QoS rules to the S-GW;
  • Step 902-b The S-GW sends a create bearer request to the MME.
  • Step 902-c The MME reserves a media bearer, and acquires UE time zone information.
  • Step 902-d The MME returns a create bearer response to the S-GW, and carries the UE time zone information in the create bearer response.
  • Step 902-e The S-GW returns a gating and QoS rule response to the PCRF, and carries the UE time zone information in the gating and QoS rule response.
  • this step includes the following steps:
  • Step 902- A The PCRF provides charging and QoS rules to the P-GW;
  • Step 902-B The P-GW sends a create bearer request to the S-GW.
  • Step 902-C The S-GW forwards a create bearer request to the MME.
  • Step 902-D The MME reserves a media bearer, and acquires UE time zone information.
  • Step 902-E The MME returns a create bearer response to the S-GW, and carries the UE time zone information in the create bearer response.
  • Step 902-F The S-GW forwards a bearer response to the P-GW, where the created bearer response carries the UE time zone information.
  • Step 902-G The P-GW returns a charging and QoS rule response to the PCRF, and carries the UE time zone information in the charging and QoS rule response.
  • Step 903 After detecting the UE time zone information as the bearer level event, the PCRF sends the UE time zone information to the PCSCF.
  • Step 904 The PCSCF responds to the PCRF.
  • the method for the access layer network element to provide the UE time zone information to the PCSCF through the PCC architecture is implemented. As shown in FIG. 15, the method includes the following steps:
  • Step 1001 After the PCSCF detects the session release event and initiates the IMS session release process, the PCSCF removes and releases the bearer-related resources and notifies the PCRF to report the UE time zone information.
  • the detecting the session release event may be receiving a SIP BYE message or the like.
  • Step 1002 When the PMIP-S5/S8 protocol is between the P-GW and the S-GW, the PCRF initiates a gating and QoS rule providing process and triggers the S-GW to deactivate the dedicated bearer, and the S-GW is in the gating and QoS rules.
  • the response carries the UE time zone information provided by the MME; when the GTP-S5/S8 protocol is between the P-GW and the S-GW, the PCRF initiates the charging and QoS rule providing process and triggers the P-GW to deactivate the dedicated bearer, P-
  • the GW carries the UE time zone information provided by the MME in the charging and QoS rule response.
  • the GW includes the following steps:
  • Step 1002-a The PCRF provides gating and QoS rules to the S-GW;
  • Step 1002-b The S-GW sends a delete bearer request to the MME.
  • Step 1002-c The MME deletes the media bearer and obtains the UE time zone information.
  • Step 1002-d The MME returns a bearer response to the S-GW, and carries the UE time zone information in the delete bearer response.
  • Step 1002-e The S-GW returns a gating and QoS rule response to the PCRF, and carries the UE time zone information in the gating and QoS rule response.
  • this step includes the following steps:
  • Step 1002-A The PCRF provides charging and QoS rules to the P-GW;
  • Step 1002-B The P-GW sends a delete bearer request to the S-GW.
  • Step 1002-C The S-GW forwards the delete bearer request to the MME.
  • Step 1002-D The MME deletes the media bearer and obtains the UE time zone information.
  • Step 1002-E The MME returns a bearer response to the S-GW, and carries the UE time zone information in the delete bearer response.
  • Step 1002-F The S-GW forwards the delete bearer response to the P-GW, where the delete bearer response carries the UE time zone information.
  • Step 1002-G The P-GW returns a charging and QoS rule response to the PCRF, and carries the UE time zone information in the charging and QoS rule response.
  • Step 1003 After detecting the UE time zone information as the bearer level event, the PCRF sends the UE time zone information to the PCSCF.
  • Step 1004 The PCSCF responds to the PCRF.
  • the UE time zone information may change during the session.
  • the operator may set the time zone information change as the bearer level event to notify the PCSCF according to its own requirements. If necessary, the PCRF detects the time zone information.
  • the PCSCF UE time zone information is changed, and the INFO message sent by the PCSCF to the SIP carries the changed time zone information to the control layer and the service layer network element except itself, and triggers the charging request message to be sent to the charging entity, and the charging entity
  • the changed time zone information can be recorded in the Partial CDR. However, this also causes a high network signaling load, and the chances of changing the time zone information in the session are very small. Most operators do not choose to increase the network load for such a small probability.
  • time zone information can be transmitted to each network element in the IMS, and the CDR carries the local time of the user during the call, which improves the accuracy of the charging, reduces the possibility of user complaints, and reduces the revenue of the operator. loss.

Description

IMS支持多时区的方法和系统及计费方法和系统 技术领域
本发明涉及第三代合作伙伴计划（ 3GPP )技术， 尤其涉及一种 IP多媒 体子系统（ IMS , IP Multimedia Subsystem ) 支持多时区的方法和系统及计 费方法和系统。 背景技术
在第三代合作伙伴计划 （3GPP )描述的 IMS网络架构中， 一套核心网 可能会覆盖一个国家的多个时区的用户，如美国的情况。所以用户设备 ( UE, User Equipment ), 接入层网元 ( Access Network Nodes ), IMS控制层网元、 业务层网元很可能各自分布在相同或不同的时区。而 UE所在的时区信息从 计费、统计以及服务质量（ QoS )控制等角度都对运营商的运营有很大意义。 在 3GPP现有的协议规范里， IMS网络架构的消息携带中的时间戳相关的信 息是世界标准时间 （ UTC , Universal Time Coordinated )格式的标准时间信 从运营商盈利的计费角度来说， 不同的时区有可能对应可配的不同费 率， 也有可能根据时区设定优惠费率时段， 因此， UE所在的时区信息从计 费、 统计的角度说对运营商是非常重要的信息。
现有的 3GPP中定义的计费系统包括离线和在线计费两部分。
其中， 离线计费用于准实时地反映计费和统计信息， 图 1表示 IMS离 线计费功能实体的组成和他们之间的关系：
计费触发功能（ CTF, Charging Trigger Function ) 内嵌在 3GPP IMS各 网元中， 包括接入层网元、 控制层网元、 业务层网元， 主要实现的功能是， 根据监测到的网络资源的使用情况， 进行计费信息的收集， 并通过 Rf接口 ( Offline Charging Reference Point )发送到计费数据功能 ( CDF, Charging Data Function ); CDF的主要功能是， 接收 CTF发送的计费请求（ ACR, Accounting Request ), 构造成计费数据记录 ( CDR, Charging Data Record ), 并通过 Ga接口发送到计费网关功能（ CGF, Charging Gateway Function ); CGF的主要功能是， 对从 CDF接收到的 CDR进行存储和管理， 并通过 Bi 接口将 CDR文件发送到计费域（ BD , Billing Domain )0
在线计费用于实时对 UE使用网络资源进行在线信用控制和统计信息 报告。 如图 2所示， 在线计费系统（OCS, Online Charging System )与 BD、 服务呼叫会话控制功能（ SCSCF, Serving Call Session Control Function )相 连， 并实时和 IMS网元通过 Ro接口交互信用控制请求信息（CCR, Credit Control Request ) /信用控制响应信息（ CCA, Credit Control Acknowledge ); 所述 IMS 网元包括多媒体资源功能控制器（MRFC )、 应用服务器（AS, Application Server )。
3GPP TS32.299定义了离线、在线 Diameter消息 ACR/CCR的相关规范， TS32.298定义了 CDR的相关规范。 CDR包含主被叫号码、 通话开始时间
( Service Delivery Start Time Stamp ), 通话结束时间 ( Service Delivery End Time Stamp )等字段，是对用户通话计费的关键信息。计费系统（BS, Billing System )一般根据用户的通话时间来计算费用。 这些时间信息， 取自 ACR 中的会话起始协议 ( SIP , Session Initiation Protocol ) 请求时间
( SIP-Request-Timestamp )和 SIP响应时间 （ SIP-Response-Timestamp )这 两个属性值对（AVP, Attribute Value Pairs )0 它们都是 Time类型， 表示自 1900年 1月 1 日以来的 UTC时间格式的秒数。
通过以上分析可知，从现有的 3GPP规范定义无法获取 UE所在时区信 息， 这样的话单， 在用户计费、 账单查询、 结算对账等方面都存在缺陷， 比如实施优惠时段计费时， 需要按照用户本地时间进行优惠计算， 其统计 信息中关于用户通信时间点信息也会出现错误， 导致客户满意度降低， 影 响运营商的营收。 发明内容
有鉴于此， 本发明的主要目的在于提供一种 IMS支持多时区的方法和 系统， 能够在 IMS中将时区信息传递到各个网元， 使各个网元获得时区信 本发明的另一目的在于提供一种 IMS计费方法和系统， 可以实现 CDR 携带通话时用户本地时间， 提高了计费的准确性， 降低用户投诉的可能性， 减少了运营商营收损失。
为达到上述目的， 本发明的技术方案是这样实现的：
本发明提供的一种 IMS支持多时区的方法， 该方法包括：
代理呼叫会话控制功能（ PCSCF, Proxy Call Session Control Function ) 网元在向除自身以外的控制层网元发送的 SIP消息中携带时区信息；
接收所述 SIP 消息的控制层网元获得所述时区信息后， 在向业务层网 元发送的 SIP消息中携带所述时区信息；
业务层网元接收所述控制层网元发送的 SIP消息，并获得所述 SIP消息 携带的所述时区信息。
上述方案中，所述 PCSCF网元在向除自身以外的控制层网元发送的 SIP 消息中携带时区信息， 为：
所述 PCSCF网元信任 UE上报的信息的情况下， 当 UE上报时区信息 时， PCSCF网元在向除自身以外的控制层网元发送的 SIP消息中携带 UE 上报的时区信息；当 UE不上报时区信息时，如果接入层网元提供时区信息， 则 PCSCF网元在向除自身以外的控制层网元发送的 SIP消息中携带接入层 网元提供的时区信息； 如果接入层网元不提供时区信息， 则 PCSCF确定 UE的时区信息， 并在向除自身以外的控制层网元发送的 SIP消息中携带所 述时区信息；
在 PCSCF不信任 UE上报的信息的情况下， 当接入层网元提供时区信 息时， PCSCF网元在向除自身以外的控制层网元发送的 SIP消息中携带接 入层网元提供的时区信息； 当接入层网元不提供时区信息时， PCSCF确定 UE的时区信息， 并在向除自身以外的控制层网元发送的 SIP消息中携带所 述时区信息。
上述方案中， 所述时区信息的携带， 为： 在发送的 SIP消息的 P接入 网络信息 （PANI ) 头中添加所述时区信息。
上述方案中， 所述接入层网元提供时区信息， 为： 在会话建立或释放 时，接入层网元将获知的 UE时区信息通过策略与计费控制（ PCC, Policyand ChargingControl ) 架构上报给 PCSCF。
本发明提供的一种 IMS支持多时区的系统，该系统包括： PCSCF网元、 除 PCSCF以外的控制层网元、 业务层网元； 其中，
PCSCF网元， 用于在向控制层网元发送的 SIP消息中携带时区信息； 控制层网元， 用于接收 PCSCF网元发送的所述 SIP消息， 并获得所述 时区信息后， 在向业务层网元发送的 SIP消息中携带所述时区信息；
业务层网元， 用于接收所述控制层网元发送的 SIP 消息， 并获得所述 SIP消息携带的所述时区信息。
上述方案中， 该系统进一步包括： UE, 用于向 PCSCF网元上报时区信 接入层网元， 用于向 PCSCF网元提供 UE的时区信息或位置信息。 上述方案中， 所述 PCSCF网元， 具体用于在信任 UE上报的信息的情 况下， 当 UE上报时区信息时， 在向除自身以外的控制层网元发送的 SIP消 息中携带 UE上报的时区信息； 当 UE不上报时区信息时， 如果接入层网元 提供时区信息， 则在向除自身以外的控制层网元发送的 SIP 消息中携带接 入层网元提供的时区信息； 如果接入层网元不提供时区信息， 则自身确定
UE的时区信息， 并在向除自身以外的控制层网元发送的 SIP消息中携带所 述时区信息；
在不信任 UE上报的信息的情况下， 当接入层网元提供时区信息时，在 向除自身以外的控制层网元发送的 SIP 消息中携带接入层网元提供的时区 信息； 当接入层网元不提供时区信息时， 自身确定 UE的时区信息， 并在向 除自身以外的控制层网元发送的 SIP消息中携带所述时区信息。
本发明提供的一种 IMS计费方法， 该方法包括： PCSCF网元在向除自 身以外的控制层网元发送的 SIP消息中携带时区信息；
接收所述 SIP 消息的控制层网元获得所述时区信息后， 在向业务层网 元发送的 SIP消息中携带所述时区信息；
业务层网元接收所述控制层网元发送的 SIP消息，并获得所述 SIP消息 携带的所述时区信息；
获得所述时区信息的各网元向计费实体发送携带时区信息的计费请求 消息；
计费实体根据各网元发送的携带时区信息的计费请求消息进行计费处 理。
上述方案中， 所述获得所述时区信息的各网元向计费实体发送携带时 区信息的计费请求消息， 为： 在离线计费系统中， 获得所述时区信息的包 括 PCSCF的控制层网元和业务层网元向 CDF发送携带时区信息的 ACR消 息； 在在线计费系统中， 获得所述时区信息的除 PCSCF以外的控制层网元 和业务层网元向 OCS发送携带时区信息的 CCR消息。
上述方案中， 所述计费实体根据各网元发送的携带时区信息的计费请 求消息进行计费处理， 为： 在离线计费系统中， 计费实体从各网元发送的 计费请求消息中获取所述时区信息， 并结合 UTC 时间格式的 SIP-Request-Timestamp AVP、 SIP-Response-Timestamp AVP , 设置各网元对 应的 CDR的时间字段包含 UE本地时间的有效信息、 即 UE的 UTC时间 + 时区信息； 在在线计费系统中， 计费实体根据各网元发送的携带时区信息 的计费请求消息得到 UE本地时间的有效信息，并根据所述有效信息进行在 线信用控制和统计。
本发明提供的一种 IMS计费系统，该系统包括： PCSCF网元、除 PCSCF 以外的控制层网元、 业务层网元、 计费实体； 其中，
PCSCF网元， 用于在向控制层网元发送的 SIP消息中携带时区信息， 并在离线计费系统中向计费实体发送携带时区信息的计费请求消息；
控制层网元， 用于接收 PCSCF网元发送的所述 SIP消息， 并获得所述 时区信息后， 在向业务层网元发送的 SIP 消息中携带所述时区信息， 并向 计费实体发送携带时区信息的计费请求消息；
业务层网元， 用于接收所述控制层网元发送的 SIP 消息， 并获得所述 SIP消息携带的所述时区信息，向计费实体发送携带时区信息的计费请求消 息；
计费实体， 用于根据各网元发送的计费请求消息进行计费处理。
上述方案中， 所述计费实体包括： 离线计费系统中的 CDF、 或在线计 费系统中的 OCS;
所述计费请求消息包括离线计费系统中的 ACR消息、或在线计费系统 中的 CCR消息。
本发明提供的 IMS 支持多时区的方法和系统及计费方法和系统， PCSCF网元在向除自身以外的控制层网元发送的 SIP消息中携带时区信息； 接收所述 SIP 消息的控制层网元获得所述时区信息后， 在向业务层网元发 送的 SIP 消息中携带所述时区信息； 业务层网元接收所述控制层网元发送 的 SIP消息， 并获得所述 SIP消息携带的所述时区信息； 如此， 可以在 IMS 中将时区信息传递到各个网元， 使各个网元获得时区信息， 并实现 CDR携 带通话时用户本地时间， 提高了计费的准确性， 降低用户投诉的可能性， 减少了运营商营收损失。 附图说明
图 1为现有的 3GPP网络中离线计费功能实体的结构示意图； 图 2为现有的 3GPP IMS网络中在线计费逻辑结构示意图；
图 3为本发明实现 IMS支持多时区的方法的流程示意图；
图 4为本发明实现 IMS支持多时区的系统的结构示意图；
图 5为本发明实现 IMS计费方法的流程示意图；
图 6为本发明实现 IMS计费系统的结构示意图；
图 7为本发明实施例一、 二和三的网络架构示意图；
图 8为本发明实施例一， PCSCF信任 UE 41的上报信息实现 IMS支持 多时区并进行离线计费的方法的流程示意图；
图 9为本发明实施例二， PCSCF不信任 UE 41的上报信息实现 IMS支 持多时区并进行离线计费的方法的流程示意图；
图 10为本发明实施例三， UE 41和接入层网元不提供时区信息实现 IMS 支持多时区并进行离线计费的方法的流程示意图；
图 11为本发明实施例四的网络架构示意图；
图 12为本发明实施例四， PCSCF信任 UE 41的上 4艮信息实现 IMS支 持多时区并进行在线计费的方法的流程示意图；
图 13为实施例五和六基于的 3GPP中定义的 PCC架构示意图； 图 14为实施例五， 在会话建立时， 实现接入层网元向 PCSCF提供 UE 时区信息的方法的流程示意图；
图 15为实施例六， 在会话释放时， 实现接入层网元向 PCSCF提供 UE 时区信息的方法的流程示意图。 具体实施方式
本发明的基本思想是： PCSCF网元在向除自身以外的控制层网元发送 的 SIP消息中携带时区信息；接收所述 SIP消息的控制层网元在向业务层网 元发送的 SIP消息中携带所述时区信息。
下面通过附图及具体实施例对本发明做进一步的详细说明。
本发明实现一种 IMS支持多时区的方法， 如图 3所示， 该方法包括以 下几个步驟：
步驟 201: PCSCF网元在向除自身以外的控制层网元发送的 SIP消息 中携带时区信息；
具体的， PCSCF网元根据配置信任 UE上报的信息的情况下： 当 UE上报时区信息时， PCSCF网元在向除自身以外的控制层网元发 送的 SIP消息中携带 UE上报的时区信息；
当 UE不上报时区信息时， 如果接入层网元提供时区信息， 则 PCSCF 网元在向除自身以外的控制层网元发送的 SIP 消息中携带接入层网元提供 的时区信息； 如果接入层网元不提供时区信息， 则 PCSCF确定 UE的时区 信息， 并在向除自身以外的控制层网元发送的 SIP 消息中携带所述时区信 息； 其中， 所述 PCSCF确定 UE的时区信息， 可以是 PCSCF根据接入层网 元提供的 UE位置信息映射出对应的时区信息；
PCSCF根据配置不信任 UE上报的信息的情况下， 即使 PCSCF收到 UE 上报的时区信息， 也将使用接入层网元提供的时区信息或自身确定的 UE的时区信息替换 UE上报的时区信息， 具体为：
在 PCSCF根据配置不信任 UE上报的信息的情况下， 当接入层网元提 供时区信息时， PCSCF网元在向除自身以外的控制层网元发送的 SIP消息 中携带接入层网元提供的时区信息； 当接入层网元不提供时区信息时， PCSCF确定 UE的时区信息， 并在向除自身以外的控制层网元发送的 SIP 消息中携带所述时区信息；所述 PCSCF确定 UE的时区信息，可以是 PCSCF 根据接入层网元提供的 UE位置信息映射出对应的时区信息；
上述方案中， 所述时区信息的携带， 一般是： 在发送的 SIP 消息的 P 接入网络信息（PANI, P-Access-Network-Info )头中添加所述时区信息， 所 述添加时区信息一般是： 在 PANI头的接入信息（access-info )部分增加时 区信息字段， 将时区信息添加到所述时区信息字段；
这里，所述接入层网元包括： 3GPP-UTRAN/EUTRAN接入的 PS域/ EPC 网元、 会话边界控制器（SBC, Session Border Controller ), 接入网关控制功 能（ AGCF, Access Gateway Control Function )等；所述演进分组核心网（ EPC ) 网元包括策略与计费规则功能（ PCRF, Policy and Charging Rules Function )、 服务网关 （S-GW )、 交换网关 （P-GW )、 移动管理实体（MME, Mobility Management Entity )等；
所述除自身以外的控制层网元可以是 SCSCF、 ICSCF ( Interrogating CSCF ), 出口网关控制功能 ( BGCF, Breakout GatewayControl Function ), 媒体网关控制功能（MGCF, Media Gateway ControlFunction )等。
步驟 202: 接收所述 SIP消息的控制层网元获得所述时区信息后， 在向 业务层网元发送的 SIP消息中携带所述时区信息；
这里， 所述在向业务层网元发送的 SIP 消息中携带所述时区信息， 一 般是， 在向业务层网元发送的 SIP消息中携带已添加时区信息的 PANI头， 所述业务层网元一般是 AS。
步驟 203: 业务层网元接收所述控制层网元发送的 SIP消息， 并获得其 中携带的所述时区信息；
这里， 所述获得时区信息， 一般是， 获得所述 SIP消息携带的 PANI头 中添加的时区信息。
通过上述步驟 201~202, 使 IMS中的业务层网元获得 UE的时区信息， 能够达到在 IMS中支持多时区的目的。
基于上述方法， 本发明还提供一种 IMS支持多时区的系统， 如图 4所 示， 该系统包括： PCSCF网元 31、 除 PCSCF以外的控制层网元 32、 业务 层网元 33; 其中，
PCSCF网元 31 , 用于在向控制层网元 32发送的 SIP消息中携带时区 信息；
控制层网元 32, 用于接收 PCSCF网元 31发送的所述 SIP消息， 并获 得所述时区信息后， 在向业务层网元 33发送的 SIP消息中携带所述时区信 业务层网元 33, 用于接收所述控制层网元发送的 SIP消息， 并获得所 述 SIP消息携带的所述时区信息；
进一步的， 该系统包括 UE 34, 用于向 PCSCF网元 31上报时区信息； 进一步的， 该系统还包括接入层网元， 用于向 PCSCF网元 31提供 UE 34的时区信息或位置信息；
所述 PCSCF网元 31在向控制层网元 32发送的 SIP消息中携带时区信 息， 具体为：
PCSCF网元 31根据配置信任 UE 34上报的信息的情况下：
当 UE 34上报时区信息时， PCSCF网元 31在向控制层网元 32发送的 SIP消息中携带 UE 34上报的时区信息；
当 UE 34不上报时区信息时，如果接入层网元提供时区信息，则 PCSCF 网元 31在向控制层网元 32发送的 SIP消息中携带接入层网元提供的时区 信息； 如果接入层网元不提供时区信息， 则 PCSCF网元 31确定 UE 34的 时区信息， 并在向控制层网元 32发送的 SIP消息中携带所述时区信息； 其 中， 所述 PCSCF网元 31确定 UE 34的时区信息， 可以是 PCSCF网元 31 根据接入层网元提供的 UE 34位置信息映射出对应的时区信息； PCSCF 网元 31 根据配置不信任 UE 34 上报的信息的情况下， 即使 PCSCF网元 31收到 UE 34上报的时区信息，也将使用接入层网元提供的时 区信息或自身确定的 UE 34的时区信息替换 UE 34上报的时区信息， 具体 为：
在 PCSCF网元 31根据配置不信任 UE 34上报的信息的情况下， 当接 入层网元提供时区信息时， PCSCF网元 31在向控制层网元 32发送的 SIP 消息中携带接入层网元提供的时区信息； 当接入层网元不提供时区信息时， PCSCF网元 31确定 UE 34的时区信息， 并在向除自身以外的控制层网元 32发送的 SIP消息中携带所述时区信息； 所述 PCSCF网元 31确定 UE 34 的时区信息， 可以是 PCSCF网元 31根据接入层网元提供的 UE 34位置信 息映射出对应的时区信息；
上述方案中，所述时区信息的携带，一般是：在发送的 SIP消息的 PANI 头中添加时区信息， 所述添加时区信息一般是： 在 PANI头的接入信息部分 增加时区信息字段， 将时区信息添加到所述时区信息字段；
所述业务层网元 33获得所述 SIP消息携带的所述时区信息， 具体为： 所述业务层网元 33获得所述 SIP消息携带的 PANI头中添加的时区信息。
基于上述方法， 本发明还实现一种 IMS计费方法， 如图 5所示， 该方 法包括以下几个步驟：
步驟 401: PCSCF网元在向除自身以外的控制层网元发送的 SIP消息 中携带时区信息；
具体的， PCSCF网元根据配置信任 UE上报的信息的情况下： 当 UE上报时区信息时， PCSCF网元在向除自身以外的控制层网元发 送的 SIP消息中携带 UE上报的时区信息；
当 UE不上报时区信息时， 如果接入层网元提供时区信息， 则 PCSCF 网元在向除自身以外的控制层网元发送的 SIP 消息中携带接入层网元提供 的时区信息； 如果接入层网元不提供时区信息， 则 PCSCF确定 UE的时区 信息， 并在向除自身以外的控制层网元发送的 SIP 消息中携带所述时区信 息； 其中， 所述 PCSCF确定 UE的时区信息， 可以是 PCSCF根据接入层网 元提供的 UE位置信息映射出对应的时区信息；
PCSCF根据配置不信任 UE上报的信息的情况下， 即使 PCSCF收到 UE 上报的时区信息， 也将使用接入层网元提供的时区信息或自身确定的 UE的时区信息替换 UE上报的时区信息， 具体为：
在 PCSCF根据配置不信任 UE上报的信息的情况下， 当接入层网元提 供时区信息时， PCSCF网元在向除自身以外的控制层网元发送的 SIP消息 中携带接入层网元提供的时区信息； 当接入层网元不提供时区信息时， PCSCF确定 UE的时区信息， 并在向除自身以外的控制层网元发送的 SIP 消息中携带所述时区信息；所述 PCSCF确定 UE的时区信息，可以是 PCSCF 根据接入层网元提供的 UE位置信息映射出对应的时区信息；
上述方案中，所述时区信息的携带，一般是：在发送的 SIP消息的 PANI 头中添加时区信息， 所述添加时区信息一般是： 在 PANI头的接入信息部分 增加时区信息字段， 将时区信息添加到所述时区信息字段；
这里，所述接入层网元包括： 3GPP-UTRAN/EUTRAN接入的 PS域/ EPC 网元、 SBC、 AGCF等；
所述除自身以外的控制层网元可以是 SCSCF、 ICSCF、 BGCF、 MGCF 等。
步驟 402: 接收所述 SIP消息的控制层网元获得所述时区信息后， 在向 业务层网元发送的 SIP消息中携带所述时区信息；
这里， 所述在向业务层网元发送的 SIP 消息中携带所述时区信息， 一 般是， 在向业务层网元发送的 SIP消息中携带已添加时区信息的 PANI头， 所述业务层网元一般是 AS。 步驟 403: 业务层网元接收所述控制层网元发送的 SIP消息， 并获得其 中携带的所述时区信息；
这里， 所述获得时区信息， 一般是， 获得所述 SIP消息携带的 PANI头 中添加的时区信息。
步驟 404：获得所述时区信息的各网元向计费实体发送携带时区信息的 计费请求消息；
具体的， 在离线计费系统中， 获得所述时区信息的包括 PCSCF的控制 层网元和业务层网元向 CDF发送携带时区信息的 ACR消息； 在在线计费 系统中， 获得所述时区信息的除 PCSCF以外的控制层网元和业务层网元向 OCS发送携带时区信息的 CCR消息； 所述除 PCSCF以外的控制层网元包 括 SCSCF和 MRCF等；
其中， 所述发送携带时区信息的 ACR消息， 一般是， 将时区信息添加 到接入网络信息 （ANI, Access-Network-Information ) AVP 中， ACR消息 携带所述 ANI AVP, 此方式简称 ANI方式； 或者新增加一个时区 AVP, 将 时区信息添加到新增加的时区 AVP中， ACR消息携带所述时区 AVP,此方 式简称 TZ方式；
所述发送携带时区信息的 CCR消息， 一般是， 将时区信息添加到 ANI AVP中， CCR消息携带所述 ANI AVP; 或者新增加一个时区 AVP, 将时区 信息添加到新增加的时区 AVP中， CCR消息携带所述时区 AVP。
步驟 405：计费实体根据各网元发送的携带时区信息的计费请求消息进 行计费处理；
具体的， 在离线计费系统中， 计费实体从各网元发送的计费请求消息
SIP-Response-Timestamp AVP,设置各网元对应的 CDR的时间字段包含 UE 本地时间的有效信息、 即 UE的 UTC时间 +时区信息； 在在线计费系统中， 计费实体根据各网元发送的携带时区信息的计费请求消息得到 UE本地时 间的有效信息， 并根据所述有效信息进行在线信用控制和统计。
为了实现上述方法， 本发明还提供一种 IMS计费系统， 如图 6所示， 该系统包括： PCSCF网元 51、 除 PCSCF以外的控制层网元 52、 业务层网 元 53、 计费实体 54; 其中，
PCSCF网元 51 , 用于在向控制层网元 52发送的 SIP消息中携带时区 信息， 并在离线计费系统中向计费实体 54发送携带时区信息的计费请求消 息；
控制层网元 52, 用于接收 PCSCF网元 51发送的所述 SIP消息， 并获 得所述时区信息后， 在向业务层网元 53发送的 SIP消息中携带所述时区信 息， 并向计费实体 54发送携带时区信息的计费请求消息；
业务层网元 53, 用于接收所述控制层网元发送的 SIP消息， 并获得其 中携带的所述时区信息，向计费实体 54发送携带时区信息的计费请求消息； 计费实体 54, 用于根据各网元发送的计费请求消息进行计费处理； 具体的， 在离线计费时， 计费实体 54从各网元发送的计费请求消息中 获取所述时区信息， 并结合 UTC时间格式的 SIP-Request-Timestamp AVP, SIP-Response-Timestamp AVP,设置各网元对应的 CDR的时间字段包含 UE 本地时间的有效信息； 在在线计费时， 计费实体 54根据各网元发送的携带 时区信息的计费请求消息得到 UE本地时间的有效信息，并根据所述有效信 息进行在线信用控制和统计。
上述中， 所述计费实体 54包括： 离线计费系统中的 CDF、 或在线计费 系统中的 OCS; 所述计费请求消息包括离线计费系统中的 ACR消息、或在 线计费系统中的 CCR消息；
上述中， 所述计费请求消息为 ACR消息时， 所述发送携带时区信息的 计费请求消息， 一般是， 将时区信息添加到 ANI AVP中， ACR消息携带所 述 ANI AVP; 或者新增加一个时区 AVP, 将时区信息添加到新增加的时区
AVP中， ACR消息携带所述时区 AVP;
进一步的， 该系统包括 UE 55, 用于向 PCSCF网元 51上报时区信息； 进一步的， 该系统还包括接入层网元， 用于向 PCSCF网元 51提供 UE
55的时区信息或位置信息；
所述 PCSCF网元 51在向控制层网元 52发送的 SIP消息中携带时区信 息， 具体为：
PCSCF网元 51根据配置信任 UE 55上报的信息的情况下：
当 UE 55上报时区信息时， PCSCF网元 51在向控制层网元 52发送的 SIP消息中携带 UE 55上报的时区信息；
当 UE 55不上报时区信息时，如果接入层网元提供时区信息，则 PCSCF 网元 51在向控制层网元 52发送的 SIP消息中携带接入层网元提供的时区 信息； 如果接入层网元不提供时区信息， 则 PCSCF网元 51确定 UE 55的 时区信息， 并在向控制层网元 52发送的 SIP消息中携带所述时区信息； 其 中， 所述 PCSCF网元 51确定 UE 55的时区信息， 可以是 PCSCF网元 51 根据接入层网元提供的 UE 55位置信息映射出对应的时区信息；
PCSCF 网元 51 根据配置不信任 UE 55 上报的信息的情况下， 即使 PCSCF网元 51收到 UE 55上报的时区信息，也将使用接入层网元提供的时 区信息或自身确定的 UE 55的时区信息替换 UE 55上报的时区信息， 具体 为：
在 PCSCF网元 51根据配置不信任 UE 55上报的信息的情况下， 当接 入层网元提供时区信息时， PCSCF网元 51在向控制层网元 52发送的 SIP 消息中携带接入层网元提供的时区信息； 当接入层网元不提供时区信息时， PCSCF网元 51确定 UE 55的时区信息， 并在向除自身以外的控制层网元 52发送的 SIP消息中携带所述时区信息； 所述 PCSCF网元 51确定 UE 55 的时区信息， 可以是 PCSCF网元 51根据接入层网元提供的 UE 55位置信 息映射出对应的时区信息；
上述方案中，所述时区信息的携带，一般是：在发送的 SIP消息的 PANI 头中添加时区信息， 所述添加时区信息一般是： 在 PANI头的接入信息部分 增加时区信息字段， 将时区信息添加到所述时区信息字段；
所述业务层网元 53获得所述 SIP消息携带的所述时区信息， 具体为： 所述业务层网元 53获得所述 SIP消息携带的 PANI头中添加的时区信息。 实施例一
本实施例如图 7所示的网络架构中， UE 41上报时区信息， PCSCF 42 根据配置信任 UE 41的上报信息， 时区 1≠时区 2,采用 ANI方式在主叫侧 ( IMS-A )携带时区信息时， 实现 IMS计费方法， 如图 8所示， 该方法包 括以下几个步驟：
步驟 501： UE 41在向 PCSCF 42发送的邀请 ( INVITE )请求中携带已 添加时区信息的 PANI头；
具体的，所述 UE 41对 PANI头进行扩展，在其中的接入信息部分增加 时区信息字段， 将自身所在时区信息添加到所述时区信息字段， 之后在向 PCSCF 42发送的 INVITE请求中携带所述 PANI头。
步驟 502: PCSCF 42收到所述 INVITE请求后，在向 SCSCF 43发送的 INVITE请求中携带已添加时区信息的 PANI头；
步驟 503: SCSCF 43收到 PCSCF 42发送的携带 PANI头的 INVITE请 求后， 在向签约的 AS 44发送的 INVITE请求中携带所述 PANI头；
步驟 504: AS 44收到 SCSCF 43送的携带 PANI头的 INVITE请求后， 向 SCSCF 43发送自身的 INVITE请求， 并携带所述 PANI头；
步驟 505： SCSCF 43发送携带所述 PANI头的 INVITE请求给被叫侧网 元；
步驟 506: 被叫侧网元向 SCSCF 43发送 200 OK响应；
步驟 507: SCSCF 43向 AS 44发送 200 OK响应；
步驟 508: AS 44向 SCSCF 43回复 200 OK响应；
步驟 509: AS 44根据 PANI头中的时区信息填写 AM AVP, 并向 CDF 45发送携带 AM AVP的 ACR消息；
步驟 510: CDF 45收到 AS 44发送的 ACR消息后，打开一张 AS CDR, 根据所述 ACR中的时区信息，设置 AS CDR的时间字段包含 UE 41本地时 间的有效信息， 即 UE 41的 UTC时间 +时区信息；
步驟 511: SCSCF 43向 PCSCF 42发送 200 OK响应；
步驟 512: SCSCF 43根据 PANI头中的时区信息填写 AM AVP, 并向 CDF 45发送携带 AM AVP的 ACR消息；
步驟 513: CDF 45收到 SCSCF 43发送的 ACR消息后，打开一张 SCSCF CDR,根据所述 ACR中的时区信息，设置 SCSCF CDR的时间字段包含 UE 41本地时间的有效信息；
步驟 514: PCSCF 42向 UE 41发送 200 OK响应；
步驟 515: PCSCF 42根据 PANI头中的时区信息填写 AM AVP, 并向 CDF 45发送携带 AM AVP的 ACR消息；
步驟 516: CDF 45收到 PCSCF 42发送的 ACR消息后，打开一张 PCSCF CDR,根据所述 ACR中时区信息，设置 PCSCF CDR的时间字段包含 UE 41 本地时间的有效信息。
实施例二
本实施例如图 7所示的网络架构中， UE 41上报或不上报时区信息，接 入层网元向 PCSCF 42提供时区信息， 且 PCSCF 42根据配置不信任 UE 41 的上报信息， 则在离线计费时， 实现 IMS计费方法， 如图 9所示， 该方法 包括以下几个步驟：
步驟 601： UE 41在向 PCSCF 42发送 SIP的 INVITE请求中携带或者 不携带时区信息， 接入层网元在向 PCSCF 42发送 SIP的 INVITE请求中携 带时区信息；
本步驟中， 所述 UE 41或接入层网元发送的 INVITE请求中携带时区 信息， 具体为： 所述 UE 41或接入层网元发送的 INVITE请求中携带已添 加时区信息的 PANI头。
步驟 602: PCSCF 42根据接入层网元的 INVITE请求， 在向 SCSCF 43 发送的 INVITE请求中携带已添加时区信息的 PANI头；
本步驟中， 由于 PCSCF 42根据配置不信任 UE 41上报信息， 在 UE 41 发送 SIP的 INVITE请求中携带时区信息时， PCSCF 42用接入层网元的 INVITE请求中携带的包含时区信息的 PANI头替换 UE 41的 INVITE请求 中的 PANI头，并在向 SCSCF 43发送的 INVITE请求中携带替换后的 PANI 头； 在 UE 41发送 SIP的 INVITE请求中不携带时区信息时， PCSCF 42在 向 SCSCF 43发送的 INVITE请求中携带从接入层网元的 INVITE请求中获 得的包含时区信息的 PANI头。
步驟 603: SCSCF 43收到 PCSCF 42发送的携带 PANI头的 INVITE请 求后， 在向签约的 AS 44发送的 INVITE请求中携带所述 PANI头；
步驟 604: AS 44收到 SCSCF 43送的携带 PANI头的 INVITE请求后， 向 SCSCF 43发送自身的 INVITE请求， 并携带所述 PANI头；
步驟 605： SCSCF 43发送携带所述 PANI头的 INVITE请求给被叫侧网 元；
步驟 606: 被叫侧网元向 SCSCF 43发送 200 OK响应；
步驟 607: SCSCF 43向 AS 44发送 200 OK响应；
步驟 608: AS 44向 SCSCF 43回复 200 OK响应； 步驟 609: AS 44根据 PANI头中的时区信息填写 ANI AVP, 并向 CDF 45发送携带 ANI AVP的 ACR消息；
本实施例采用扩展 PANI头的方式来携带 UE 41所在时区信息，对应到 计费消息 Diameter中的 ANI AVP, 如果采用别的方式携带 UE 41所在时区 信息， 则 AS 44也可以将 UE 41 所在时区信息作为单独的 AVP增加到 Diameter ACR消息中或扩展别的 ACR消息中的既有 AVP发送给 CDF 45。
步驟 610: CDF 45收到 AS 44发送的 ACR消息后，打开一张 AS CDR, 根据所述 ACR消息中的时区信息，设置 AS CDR的时间字段包含 UE 41本 地时间的有效信息， 即 UE 41的 UTC时间 +时区信息；
步驟 611: SCSCF 43向 PCSCF 42发送 200 OK响应；
步驟 612: SCSCF 43根据 PANI头中的时区信息填写 ANI AVP, 并向 CDF 45发送携带 ANI AVP的 ACR消息；
本实施例采用扩展 PANI头的方式来携带用户所在时区信息，如果采用 别的方式携带，则 SCSCF 43也可以将 UE 41所在时区信息作为单独的 AVP 增加到 Diameter ACR消息中或扩展别的 ACR消息中的既有 AVP发送给 CDF 45。
步驟 613: CDF 45收到 SCSCF 43发送的 ACR消息后，打开一张 SCSCF CDR, 根据所述 ACR消息中的时区信息， 设置 SCSCF CDR的时间字段包 含 UE 41本地时间的有效信息；
步驟 614: PCSCF 42向 UE 41发送 200 OK响应；
步驟 615: PCSCF 42根据 PANI头中的时区信息填写 ANI AVP, 并向 CDF 45发送携带 ANI AVP的 ACR消息；
本实施例采用扩展 PANI头的方式来携带用户所在时区信息，如果采用 别的方式携带，则 PCSCF 42也可以将 UE 41所在时区信息作为单独的 AVP 增加到 Diameter ACR消息中或扩展别的 ACR消息中的既有 AVP发送给 CDF 45。
步驟 616: CDF 45收到 PCSCF 42发送的 ACR消息后，打开一张 PCSCF CDR, 根据所述 ACR消息中的时区信息， 设置 PCSCF CDR的时间字段包 含 UE 41本地时间的有效信息。
实施例三
本实施例如图 6所示的网络架构中， UE 41和接入层网元不提供时区信 息， PCSCF 42根据位置信息确定 UE 41的时区信息， 则在离线计费时， 实 现 IMS计费方法， 如图 10所示， 该方法包括以下几个步驟：
步驟 701： UE 41向 PCSCF 42发送 SIP的 INVITE请求；
步驟 702: PCSCF 42收到所述 INVITE请求后，在向 SCSCF 43发送的 INVITE请求中携带已添加时区信息的 PANI头；
本步驟中， PCSCF根据 UE 41或者接入层网元提供的 UE 41所在的位 置信息， 如： 跟踪区域（TA, Tracking Area )或小区标识 Cell ID等， 在自 身的配置表里映射出 UE 41所在的时区信息， 并将所述时区信息添加在向 SCSCF 43发送的 INVITE请求的 PANI头中； 所述 PCSCF上的配置表指的 是允许运营商自行配置的反应 UE所在位置信息和对应 UE所在时区信息的 映射关系的表格。
步驟 703: SCSCF 43收到 PCSCF 42发送的携带 PANI头的 INVITE请 求后， 在向签约的 AS 44发送的 INVITE请求中携带所述 PANI头；
步驟 704: AS 44收到 SCSCF 43送的携带 PANI头的 INVITE请求后， 向 SCSCF 43发送自身的 INVITE请求， 并携带所述 PANI头；
步驟 705： SCSCF 43发送携带所述 PANI头的 INVITE请求给被叫侧网 元；
步驟 706: 被叫侧网元向 SCSCF 43发送 200 OK响应；
步驟 707: SCSCF 43向 AS 44发送 200 OK响应； 步驟 708: AS 44向 SCSCF 43回复 200 OK响应；
步驟 709: AS 44根据 PANI头中的时区信息填写 ANI AVP, 并向 CDF 45发送携带 ANI AVP的 ACR消息；
本实施例采用扩展 PANI头的方式来携带 UE 41所在时区信息，对应到 计费消息 Diameter中的 ANI AVP, 如果采用别的方式携带， 则 AS 44也可 以将 UE 41所在时区信息作为单独的 AVP增加到 Diameter ACR消息中或 扩展别的 ACR消息中的既有 AVP发送给 CDF 45。
步驟 710: CDF 45收到 AS 44发送的 ACR消息后，打开一张 AS CDR, 根据所述 ACR消息中的时区信息，设置 AS CDR的时间字段包含 UE 41本 地时间的有效信息， 即 UE 41的 UTC时间 +时区信息；
步驟 711: SCSCF 43向 PCSCF 42发送 200 OK响应；
步驟 712: SCSCF 43根据 PANI头中的时区信息填写 ANI AVP, 并向 CDF 45发送携带 ANI AVP的 ACR消息；
本实施例采用扩展 PANI头的方式来携带 UE 41所在时区信息，如果采 用别的方式携带， 则 SCSCF 43也可以将 UE 41所在时区信息作为单独的 AVP增加到 Diameter ACR消息中或扩展别的 ACR消息中的既有 AVP发送 给 CDF 45。
步驟 713: CDF 45收到 SCSCF 43发送的 ACR消息后，打开一张 SCSCF CDR, 根据所述 ACR消息中的时区信息， 设置 SCSCF CDR的时间字段包 含 UE 41本地时间的有效信息；
步驟 714: PCSCF 42向 UE 41发送 200 OK响应；
步驟 715: PCSCF 42根据 PANI头中的时区信息填写 ANI AVP, 并向 CDF 45发送携带 ANI AVP的 ACR消息；
本实施例采用扩展 PANI头的方式来携带 UE 41所在时区信息，如果采 用别的方式携带， 则 PCSCF 42也可以将 UE 41所在时区信息作为单独的 AVP增加到 Diameter ACR消息中或扩展别的 ACR消息中的既有 AVP发送 给 CDF 45。
步驟 716: CDF 45收到 PCSCF 42发送的 ACR消息后，打开一张 PCSCF CDR, 根据所述 ACR消息中的时区信息， 设置 PCSCF CDR的时间字段包 含 UE 41本地时间的有效信息。
实施例四
本实施例中， UE 41上报时区信息， 且 PCSCF根据配置信任 UE的上 才艮信息， 在如图 11所示的网络架构中， 时区 1≠时区 2≠时区 3, 采用 ANI 方式由主叫侧 UE 41 ( IMS-A )携带时区信息， 在在线计费时， 实现 IMS 计费方法， 如图 12所示， 该方法包括以下几个步驟：
步驟 801 : UE 41向 PCSCF 42发送 SIP的 INVITE请求，携带含有 UE 41时区信息的 PANI头；
步驟 802: PCSCF 42收到所述 INVITE请求后，在向 SCSCF 43发送的 INVITE请求中携带已添加时区信息的 PANI头；
具体的， PCSCF 42收到所述 INVITE请求后， PCSCF 42根据配置信任 UE 41上报的时区信息，将已添加时区信息的 PANI头透传， 即在向 SCSCF 43发送的 INVITE请求中携带已添加时区信息的 PANI头。
步驟 803: SCSCF 43收到 PCSCF 42发送的携带 PANI头的 INVITE请 求后， 在向签约的 AS 44发送的 INVITE请求中携带所述 PANI头；
步驟 804: AS 44收到 SCSCF 43送的携带 PANI头的 INVITE请求后， 向 SCSCF 43发送自身的 INVITE请求， 并携带所述 PANI头；
步驟 805： SCSCF 43发送携带所述 PANI头的 INVITE请求给被叫侧网 元；
步驟 806: 被叫侧网元向 SCSCF 43发送 200 OK响应；
步驟 807: SCSCF 43向 AS 44发送 200 OK响应； 步驟 808: AS 44向 SCSCF 43回复 200 OK响应；
步驟 809: 8 44根据？ ^1头中的时区信息填写 ^[ ¥?, 并向 OCS 45发送携带 ANI AVP的 CCR消息；
本实施例采用扩展 PANI头的方式来携带 UE 41所在时区信息，对应到 计费消息 Diameter中的 ANI AVP, 如果采用别的方式携带， 则 AS 44也可 以将 UE 41所在时区信息作为单独的 AVP增加到 Diameter CCR消息中或 扩展别的 CCR消息中的既有 AVP发送给 OCS 45。
步驟 810: OCS 45根据所述 CCR消息中的时区信息得到 UE 41本地时 间的有效信息， 并根据所述有效信息进行在线信用控制和统计；
步驟 811: SCSCF 43向 PCSCF 42发送 200 OK响应；
步驟 812: SCSCF 43 向 IMS 网关功能（ IMS-GWF )发送携带 PANI 头的 INVITE请求， IMS-GWF根据所述 PANI头中的时区信息填写 ANI AVP, 并向 OCS 45发送携带 ANI AVP的 CCR消息；
本实施例采用扩展 PANI头的方式来携带 UE 41所在时区信息，对应到 计费消息 Diameter中的 ANI AVP, 如果采用别的方式携带， 则 SCSCF 43 也可以将 UE 41所在时区信息作为单独的 AVP增加到 Diameter CCR消息 中或扩展别的 CCR消息中的既有 AVP发送给 OCS 45。
步驟 813: OCS 45根据所述 CCR消息中的时区信息得到 UE 41本地时 间的有效信息， 并根据所述有效信息进行在线信用控制和统计；
步驟 814: PCSCF 42向 UE 41发送 200 OK响应。
以上均为主叫发起会话的实施例，其他移动台的终呼流程中对 UE所在 时区信息的处理与上述实施例类似， 不再赘述。
以上实施例中均采用扩展 PANI头的方式传递时区信息，其他传递时区 信息的方式还包括： 单独采用一个信息字段或者扩展其他字段来传递时区 信息。 由于某些国家可能只有一个时区， 即： 不存在跨时区部署核心网的问 题， 如： 欧盟的各国等， UE所在时区信息在这种情况下的网间传递， 根据 当地运营商的需求是可选的。
下面通过实施例五和六对实施例二中接入层网元向 PCSCF提供时区信 息的过程进行具体描述， 实施例五和六均基于图 13所示的 3GPP中定义的 PCC架构， PCRF根据用户签约数据库（ SPR, Subscription Profile Repository ) 的签约信息、 AF下发的业务信息以及承载绑定及事件报告功能（BBERF, Bearing Binding and Event Report Function )上报的触发计费策略和 QoS变 化的事件信息下发新的策略进行策略和计费控制， PCEF通过 Gy和 Gz接 口分别进行在线和离线消息传递。
实施例五
本实施例中， 在会话建立时， 实现接入层网元通过 PCC架构向 PCSCF 提供 UE时区信息的方法， 如图 14所示， 该方法包括以下几个步驟：
步驟 901: 在 IMS会话建立时， PCSCF授权会话所需的资源， 并提供 业务信息给 PCRF, 通知 PCRF上报 UE时区信息；
步驟 902: 在 P-GW和 S-GW之间为 PMIP-S5/S8协议时， PCRF发起 门控和 QoS规则提供过程并触发 S-GW分配专用承载， S-GW在门控和 QoS 规则响应中携带 MME提供的 UE时区信息； 在 P-GW和 S-GW之间为 GTP-S5/S8协议时， PCRF发起计费和 QoS规则提供过程并触发 P-GW分配 专用承载， P-GW在计费和 QoS规则响应中携带 MME提供的 UE时区信息； 具体的， 在 P-GW和 S-GW之间为 PMIP-S5/S8协议时， 本步驟包括以 下几个步驟：
步驟 902-a: PCRF向 S-GW提供门控和 QoS规则；
步驟 902-b: S-GW向 MME发送创建承载请求；
步驟 902-c: MME预定媒体承载， 并获取 UE时区信息； 步驟 902-d: MME向 S-GW返回创建承载响应 , 并在创建承载响应中 携带 UE时区信息；
步驟 902-e: S-GW向 PCRF返回门控和 QoS规则响应， 在门控和 QoS 规则响应中携带 UE时区信息。
在 P-GW和 S-GW之间为 GTP-S5/S8协议时， 本步驟包括以下几个步 驟：
步驟 902- A: PCRF向 P-GW提供计费和 QoS规则；
步驟 902-B: P-GW向 S-GW发送创建承载请求；
步驟 902-C: S-GW向 MME转发创建承载请求；
步驟 902-D: MME预定媒体承载， 并获取 UE时区信息；
步驟 902-E: MME向 S-GW返回创建承载响应， 并在创建承载响应中 携带 UE时区信息；
步驟 902-F: S-GW向 P-GW转发创建承载响应， 所述创建承载响应中 携带 UE时区信息；
步驟 902-G: P-GW向 PCRF返回计费和 QoS规则响应，在计费和 QoS 规则响应中携带 UE时区信息。
步驟 903: PCRF检测到作为承载级别事件的 UE 时区信息之后， 向 PCSCF发送所述 UE时区信息；
步驟 904: PCSCF响应 PCRF。
实施例六
本实施例中， 在会话释放时， 实现接入层网元通过 PCC架构向 PCSCF 提供 UE时区信息的方法， 如图 15所示， 该方法包括以下几个步驟：
步驟 1001 : PCSCF检测到会话释放事件发起 IMS会话释放流程后，移 除和释放承载相关的资源并通知 PCRF上报 UE时区信息；
本步驟中， 所述检测到会话释放事件可以是收到 SIP BYE消息等。 步驟 1002: 在 P-GW和 S-GW之间为 PMIP-S5/S8协议时， PCRF发起 门控和 QoS规则提供过程并触发 S-GW去激活专用承载， S-GW在门控和 QoS规则响应中携带 MME提供的 UE时区信息；在 P-GW和 S-GW之间为 GTP-S5/S8协议时， PCRF发起计费和 QoS规则提供过程并触发 P-GW去激 活专用承载， P-GW在计费和 QoS规则响应中携带 MME提供的 UE时区信 具体的， 在 P-GW和 S-GW之间为 PMIP-S5/S8协议时， 本步驟包括以 下几个步驟：
步驟 1002-a: PCRF向 S-GW提供门控和 QoS规则；
步驟 1002-b: S-GW向 MME发送删除承载请求；
步驟 1002-c: MME删除媒体承载， 并获取 UE时区信息；
步驟 1002-d: MME向 S-GW返回删除承载响应， 并在删除承载响应中 携带 UE时区信息；
步驟 1002-e: S-GW向 PCRF返回门控和 QoS规则响应，在门控和 QoS 规则响应中携带 UE时区信息。
在 P-GW和 S-GW之间为 GTP-S5/S8协议时， 本步驟包括以下几个步 驟：
步驟 1002-A: PCRF向 P-GW提供计费和 QoS规则；
步驟 1002-B: P-GW向 S-GW发送删除承载请求；
步驟 1002-C: S-GW向 MME转发删除承载请求；
步驟 1002-D: MME删除媒体承载， 并获取 UE时区信息；
步驟 1002-E: MME向 S-GW返回删除承载响应，并在删除承载响应中 携带 UE时区信息；
步驟 1002-F: S-GW向 P-GW转发删除承载响应， 所述删除承载响应 中携带 UE时区信息； 步驟 1002-G: P-GW向 PCRF返回计费和 QoS规则响应，在计费和 QoS 规则响应中携带 UE时区信息。
步驟 1003: PCRF检测到作为承载级别事件的 UE时区信息之后， 向 PCSCF发送所述 UE时区信息；
步驟 1004: PCSCF响应 PCRF。
值得说明的是，在会话过程中的 UE时区信息有可能发生改变，运营商 可以根据自己的需求设定时区信息的改变是否作为承载级别事件由 PCRF 通知 PCSCF;如果需要， 则 PCRF检测到时区信息改变时，通知 PCSCF UE 时区信息改变， PCSCF发送 SIP 的 INFO消息携带变化后的时区信息到除 自身以外的控制层和业务层网元， 并触发计费请求消息发送到计费实体， 计费实体可以在部分话单（Partial CDR )里记录变化后的时区信息。 不过， 这也会造成很高的网络信令负荷， 而且会话中的时区信息改变发生几率非 常小， 大多数运营商都不会为了这么小的概率选择增加网络负载。
通过本发明的方法， 可以在 IMS中将时区信息传递到各个网元， 并实 现 CDR携带通话时用户本地时间， 提高了计费的准确性， 降低用户投诉的 可能性， 减少了运营商营收损失。
以上所述， 仅为本发明的较佳实施例而已， 并非用于限定本发明的保 护范围， 凡在本发明的精神和原则之内所作的任何修改、 等同替换和改进 等， 均应包含在本发明的保护范围之内。

Claims

权利要求书
1、 一种 IP多媒体子系统（IMS )支持多时区的方法， 其特征在于， 该 方法包括：
代理呼叫会话控制功能 （PCSCF ) 网元在向除自身以外的控制层网元 发送的会话起始协议 ( SIP ) 消息中携带时区信息；
接收所述 SIP 消息的控制层网元获得所述时区信息后， 在向业务层网 元发送的 SIP消息中携带所述时区信息；
业务层网元接收所述控制层网元发送的 SIP消息，并获得所述 SIP消息 携带的所述时区信息。
2、 根据权利要求 1所述的方法， 其特征在于， 所述 PCSCF网元在向 除自身以外的控制层网元发送的 SIP消息中携带时区信息， 为：
所述 PCSCF网元信任用户设备（UE )上报的信息的情况下， 当 UE上 才艮时区信息时， PCSCF网元在向除自身以外的控制层网元发送的 SIP消息 中携带 UE上报的时区信息； 当 UE不上报时区信息时， 如果接入层网元提 供时区信息， 则 PCSCF网元在向除自身以外的控制层网元发送的 SIP消息 中携带接入层网元提供的时区信息； 如果接入层网元不提供时区信息， 则 PCSCF确定 UE的时区信息， 并在向除自身以外的控制层网元发送的 SIP 消息中携带所述时区信息；
在 PCSCF不信任 UE上报的信息的情况下， 当接入层网元提供时区信 息时， PCSCF网元在向除自身以外的控制层网元发送的 SIP消息中携带接 入层网元提供的时区信息； 当接入层网元不提供时区信息时， PCSCF确定 UE的时区信息， 并在向除自身以外的控制层网元发送的 SIP消息中携带所 述时区信息。
3、 根据权利要求 2所述的方法， 其特征在于， 所述时区信息的携带， 为： 在发送的 SIP消息的 P接入网络信息（PANI )头中添加所述时区信息。
4、 根据权利要求 2所述的方法， 其特征在于， 所述接入层网元提供时 区信息， 为： 在会话建立或释放时，接入层网元将获知的 UE时区信息通过 策略与计费控制 （PCC ) 架构上报给 PCSCF。
5、 一种 IMS 支持多时区的系统， 其特征在于， 该系统包括： PCSCF 网元、 除 PCSCF以外的控制层网元、 业务层网元； 其中，
PCSCF网元， 用于在向控制层网元发送的 SIP消息中携带时区信息； 控制层网元， 用于接收 PCSCF网元发送的所述 SIP消息， 并获得所述 时区信息后， 在向业务层网元发送的 SIP消息中携带所述时区信息；
业务层网元， 用于接收所述控制层网元发送的 SIP 消息， 并获得所述
SIP消息携带的所述时区信息。
6、根据权利要求 5所述的系统，其特征在于，该系统进一步包括： UE, 用于向 PCSCF网元上 ·^艮时区信息；
接入层网元， 用于向 PCSCF网元提供 UE的时区信息或位置信息。
7、 根据权利要求 6所述的系统， 其特征在于， 所述 PCSCF网元， 具 体用于在信任 UE上报的信息的情况下， 当 UE上报时区信息时， 在向除自 身以外的控制层网元发送的 SIP消息中携带 UE上报的时区信息； 当 UE不 上报时区信息时， 如果接入层网元提供时区信息， 则在向除自身以外的控 制层网元发送的 SIP 消息中携带接入层网元提供的时区信息； 如果接入层 网元不提供时区信息， 则自身确定 UE的时区信息，并在向除自身以外的控 制层网元发送的 SIP消息中携带所述时区信息；
在不信任 UE上报的信息的情况下， 当接入层网元提供时区信息时，在 向除自身以外的控制层网元发送的 SIP 消息中携带接入层网元提供的时区 信息； 当接入层网元不提供时区信息时， 自身确定 UE的时区信息， 并在向 除自身以外的控制层网元发送的 SIP消息中携带所述时区信息。
8、 一种 IMS计费方法， 其特征在于， 该方法包括： PCSCF网元在向 除自身以外的控制层网元发送的 SIP消息中携带时区信息；
接收所述 SIP 消息的控制层网元获得所述时区信息后， 在向业务层网 元发送的 SIP消息中携带所述时区信息；
业务层网元接收所述控制层网元发送的 SIP消息，并获得所述 SIP消息 携带的所述时区信息；
获得所述时区信息的各网元向计费实体发送携带时区信息的计费请求 消息；
计费实体根据各网元发送的携带时区信息的计费请求消息进行计费处 理。
9、 根据权利要求 8所述的方法， 其特征在于， 所述 PCSCF网元在向 除自身以外的控制层网元发送的 SIP消息中携带时区信息， 为：
所述 PCSCF网元信任 UE上报的信息的情况下， 当 UE上报时区信息 时， PCSCF网元在向除自身以外的控制层网元发送的 SIP消息中携带 UE 上报的时区信息；当 UE不上报时区信息时，如果接入层网元提供时区信息， 则 PCSCF网元在向除自身以外的控制层网元发送的 SIP消息中携带接入层 网元提供的时区信息； 如果接入层网元不提供时区信息， 则 PCSCF确定 UE的时区信息， 并在向除自身以外的控制层网元发送的 SIP消息中携带所 述时区信息；
在 PCSCF不信任 UE上报的信息的情况下， 当接入层网元提供时区信 息时， PCSCF网元在向除自身以外的控制层网元发送的 SIP消息中携带接 入层网元提供的时区信息； 当接入层网元不提供时区信息时， PCSCF确定 UE的时区信息， 并在向除自身以外的控制层网元发送的 SIP消息中携带所 述时区信息。
10、 根据权利要求 8所述的方法， 其特征在于， 所述获得所述时区信 息的各网元向计费实体发送携带时区信息的计费请求消息， 为： 在离线计 费系统中， 获得所述时区信息的包括 PCSCF的控制层网元和业务层网元向 计费数据功能（CDF )发送携带时区信息的计费请求（ACR ) 消息； 在在 线计费系统中， 获得所述时区信息的除 PCSCF以外的控制层网元和业务层 网元向在线计费系统 （OCS )发送携带时区信息的信用控制请求（CCR ) 消息。
11、 根据权利要求 8 所述的方法， 其特征在于， 所述计费实体根据各 网元发送的携带时区信息的计费请求消息进行计费处理， 为： 在离线计费 系统中， 计费实体从各网元发送的计费请求消息中获取所述时区信息， 并 结合 UTC时间格式的 SIP请求时间属性值对（ SIP-Request-Timestamp AVP )、 SIP响应时间属性值对 ( SIP-Response-Timestamp AVP ), 设置各网元对应的 计费数据记录（ CDR )的时间字段包含 UE本地时间的有效信息、 即 UE的 UTC时间 +时区信息； 在在线计费系统中，计费实体根据各网元发送的携带 时区信息的计费请求消息得到 UE本地时间的有效信息，并根据所述有效信 息进行在线信用控制和统计。
12、 一种 IMS计费系统， 其特征在于， 该系统包括： PCSCF网元、 除 PCSCF以外的控制层网元、 业务层网元、 计费实体； 其中，
PCSCF网元， 用于在向控制层网元发送的 SIP消息中携带时区信息， 并在离线计费系统中向计费实体发送携带时区信息的计费请求消息；
控制层网元， 用于接收 PCSCF网元发送的所述 SIP消息， 并获得所述 时区信息后， 在向业务层网元发送的 SIP 消息中携带所述时区信息， 并向 计费实体发送携带时区信息的计费请求消息；
业务层网元， 用于接收所述控制层网元发送的 SIP 消息， 并获得所述 SIP消息携带的所述时区信息，向计费实体发送携带时区信息的计费请求消 息；
计费实体， 用于根据各网元发送的计费请求消息进行计费处理。
13、 根据权利要求 12所述的系统， 其特征在于， 所述 PCSCF网元， 具体用于在信任 UE上报的信息的情况下， 当 UE上报时区信息时， 在向除 自身以外的控制层网元发送的 SIP消息中携带 UE上报的时区信息； 当 UE 不上报时区信息时， 如果接入层网元提供时区信息， 则在向除自身以外的 控制层网元发送的 SIP 消息中携带接入层网元提供的时区信息； 如果接入 层网元不提供时区信息， 则自身确定 UE的时区信息， 并在向除自身以外的 控制层网元发送的 SIP消息中携带所述时区信息；
在不信任 UE上报的信息的情况下， 当接入层网元提供时区信息时，在 向除自身以外的控制层网元发送的 SIP 消息中携带接入层网元提供的时区 信息； 当接入层网元不提供时区信息时， 自身确定 UE的时区信息， 并在向 除自身以外的控制层网元发送的 SIP消息中携带所述时区信息。
14、 根据权利要求 12所述的系统， 其特征在于， 所述计费实体包括： 离线计费系统中的 CDF、 或在线计费系统中的 OCS;
所述计费请求消息包括离线计费系统中的 ACR消息、 或在线计费系统 中的 CCR消息。
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