WO2009024048A1 - A method, network system, pdn gw and accounting system for managing accounting - Google Patents

A method, network system, pdn gw and accounting system for managing accounting Download PDF

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Publication number
WO2009024048A1
WO2009024048A1 PCT/CN2008/071820 CN2008071820W WO2009024048A1 WO 2009024048 A1 WO2009024048 A1 WO 2009024048A1 CN 2008071820 W CN2008071820 W CN 2008071820W WO 2009024048 A1 WO2009024048 A1 WO 2009024048A1
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WO
WIPO (PCT)
Prior art keywords
charging
mode
packet data
data network
network gateway
Prior art date
Application number
PCT/CN2008/071820
Other languages
English (en)
French (fr)
Inventor
Chun Li
Mingjun Shan
Jiao Kang
Xin Shi
Original Assignee
Huawei Technologies Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Priority to EP08783813.2A priority Critical patent/EP2180683B1/en
Publication of WO2009024048A1 publication Critical patent/WO2009024048A1/zh
Priority to US12/710,235 priority patent/US8311016B2/en
Priority to US12/874,075 priority patent/US8064877B2/en

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Classifications

    • 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
    • H04M15/81—Dynamic pricing, e.g. change of tariff during call
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q40/00—Finance; Insurance; Tax strategies; Processing of corporate or income taxes
    • G06Q40/12—Accounting
    • 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
    • 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
    • H04M15/55—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP for hybrid networks
    • 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
    • H04M15/65—Off-line charging system
    • 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
    • H04M15/66—Policy and charging system
    • 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
    • H04M15/80—Rating or billing plans; Tariff determination aspects
    • H04M15/8038—Roaming or handoff
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/24—Accounting or billing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2215/00—Metering arrangements; Time controlling arrangements; Time indicating arrangements
    • H04M2215/01—Details of billing arrangements
    • H04M2215/0112—Dynamic pricing, e.g. change of tariff during call
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2215/00—Metering arrangements; Time controlling arrangements; Time indicating arrangements
    • H04M2215/20—Technology dependant metering
    • H04M2215/2026—Wireless network, e.g. GSM, PCS, TACS
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2215/00—Metering arrangements; Time controlling arrangements; Time indicating arrangements
    • H04M2215/20—Technology dependant metering
    • H04M2215/2033—WLAN
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2215/00—Metering arrangements; Time controlling arrangements; Time indicating arrangements
    • H04M2215/20—Technology dependant metering
    • H04M2215/2046—Hybrid network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2215/00—Metering arrangements; Time controlling arrangements; Time indicating arrangements
    • H04M2215/74—Rating aspects, e.g. rating parameters or tariff determination apects
    • H04M2215/7442—Roaming
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/12—Reselecting a serving backbone network switching or routing node
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/16—Gateway arrangements

Definitions

  • Billing processing method and network system Packet Data network gateway and billing system
  • the present invention relates to the field of communication networks, and in particular, to a charging processing method and network system, a packet data network gateway, and a charging system. Background technique
  • the charging mode generally includes traffic, duration or event. Perform billing, etc.
  • SAE core network system architecture evolution
  • ETS Evolved UMTS Terrestrial Radio Access Network
  • WLAN wireless local area network
  • the charging architecture of the SAE architecture can use the E-UTRAN access mode and the WLAN access mode.
  • the online charging set point is set in the packet data network gateway PDN GW, and the charging information of the corresponding bearer layer is collected from the PDN GW and reported to the online charging system OCS (Online Charging System).
  • OCS Online Charging System
  • the online charging point can be set in the ePDG (Evolved Packet Data Gateway), the packet data network gateway PDN GW, or the 3 A authentication server 3GPP AAA Server, and these collection points collect the corresponding bearer layer of the WLAN.
  • the billing information is reported to the OCS for billing control, such as deduction.
  • the embodiments of the present invention provide a charging processing method, a network system, a packet data network gateway, and a charging system, which can implement an uninterrupted charging process in a manner in which a user terminal accesses a packet data network gateway.
  • the embodiment of the present invention provides a charging processing method, including:
  • the charging system When it is detected that the manner in which the user terminal accesses the packet data network gateway changes from the first mode to the second mode, the charging system includes the charging request of the second mode type.
  • An embodiment of the present invention provides a charging processing method, including:
  • the user terminal accesses the packet data network gateway from the first mode to the second mode, receiving a charging request that includes the second mode type; and accessing the user terminal according to the charging request Performing charging control according to the quota usage amount in the charging mode corresponding to the first mode of the packet data network gateway, and according to the charging mode corresponding to the second mode of the user terminal accessing the packet data network gateway, The quota reservation is performed on the charging session in the second mode.
  • An embodiment of the present invention provides a network system, including: a packet data network gateway, configured to detect that a manner in which a user terminal accesses the packet data network gateway is changed from a first mode to a second mode, and the second a mode-type charging request; a charging system, configured to receive a charging request sent by the packet data network gateway, and according to the charging request, a first manner for the user terminal to access the packet data network gateway Charging control for the quota usage in the corresponding charging mode, and charging the second mode according to the charging mode corresponding to the second mode in which the user terminal accesses the packet data network gateway The session is reserved for quotas.
  • the embodiment of the present invention provides a packet data network gateway, including: a detecting unit, configured to monitor a change of a manner in which a user terminal accesses a packet data network gateway; and an accounting requesting unit, configured to detect, at the detecting unit, a user terminal accessing station After the manner of converting the packet data network gateway from the first mode to the second mode, the charging system includes the charging request of the second mode type.
  • An embodiment of the present invention provides a charging system, including: a receiving unit, configured to receive a second mode type charging request that is sent by a packet data network gateway and that includes the user terminal accessing the packet data network gateway; And performing charging control on a quota usage amount in a charging mode corresponding to the first mode of accessing the packet data network gateway by the user terminal according to the charging request received by the receiving unit, and according to the The charging mode corresponding to the second mode of the user terminal accessing the packet data network gateway is performed, and the charging session of the second mode is reserved.
  • the technical solution of the embodiment of the present invention is to fully utilize the centralized control function of the packet data network gateway, and detect, by the packet data network gateway, a change of a manner in which the user terminal accesses the packet data network gateway, when detecting that the user terminal accesses the packet. After the mode of the data network gateway is changed from the first mode to the second mode, the charging system sends a charging request including the second mode type, and the charging system performs the user terminal according to the charging request.
  • the charging usage of the charging mode in the charging mode corresponding to the first mode of accessing the packet data network gateway is performed, and according to the second mode of the user terminal accessing the packet data network gateway In the fee mode, quota reservation is performed on the charging session in the second mode, so as to implement uninterrupted charging processing in a process in which the manner in which the user terminal accesses the packet data network gateway changes.
  • FIG. 1 is a schematic diagram of a charging architecture for combining different access modes according to an embodiment of the present invention
  • FIG. 2 is a flowchart of a charging processing method according to an embodiment of the present invention.
  • FIG. 3 is a flowchart of a charging process after a UE establishes an E-UTRAN connection according to an embodiment of the present invention
  • FIG. 4 is a flow chart of the E-UTRAN switching to a WLAN charging process according to an embodiment of the present invention
  • FIG. 5 is a schematic structural diagram of a network system according to an embodiment of the present invention. detailed description
  • the embodiment of the invention provides a charging processing method, which can implement an uninterrupted charging process during a change of a manner in which a user terminal accesses a packet data network gateway.
  • FIG. 1 it is a schematic diagram of a charging architecture that combines different access modes according to an embodiment of the present invention.
  • the charging architecture of Figure 1 can implement uninterrupted charging processing during the change of the manner in which the user terminal accesses the packet data network gateway.
  • 1 includes an access network of an E-UTRAN, a mobility management entity MME, a serving gateway Serving GW, a home subscriber server HSS, a packet data network gateway PDN GW, an online charging system OCS, a service network (eg, an IMS network), and a WLAN connection.
  • 3A authentication server 3GPP AAA Server the access network of the WLAN includes WAG and ePDG.
  • the online charging point is set in the PDN GW, and the charging information of the corresponding bearer layer is collected from the PDN GW.
  • FIG. 1 only illustrates the switching between the E-UTRAN mode and the WLAN mode, and may also be the switching of other access modes, for example, switching from the E-UTRAN mode to the 2G/3G access mode.
  • SAE can support multiple access methods, including: 2nd generation mobile communication network 2G/third generation mobile communication network 3G, E-UTRAN and non-3GPP IP access, non-3GPP IP access is trusted And untrustworthy, where untrusted non-3GPP IP access needs to be accessed through ePDG, which belongs to untrusted non-3GPP IP access.
  • the SAE supports the switching of the user terminal between multiple access modes. For example, the user terminal shown in FIG. 1 can be switched from the E-UTRAN mode to the WLAN mode.
  • the mobility management entity MME mainly processes mobility management, and includes: storing a UE control plane context, including a user identifier UEID, a user status, and a tracking Area TA (Tracking Area), etc.; perform mobility management; perform authentication and key management; perform signaling encryption and integrity protection; manage and assign user temporary IDs, etc.
  • the MME also undertakes the function of controlling signaling interaction, and can interact with the home subscriber server HSS (Home Subscriber Server), and is responsible for authentication of the user identity.
  • HSS Home Subscriber Server
  • Serving GW which is mainly responsible for the processing of user plane data, including: routing and forwarding of data; performing data header compression; storing UE user plane context, including basic IP bearer information, routing information, and the like. After the Serving GW establishes the bearer with the base station through the MME, it is responsible for the relay and routing of the user data packets.
  • the packet data network gateway PDN GW is mainly responsible for processing the user plane between systems, including: handling user plane switching between different access systems; data routing and forwarding; charging data collection; implementing connection to packet data network PDN (Package Gateway function of Data Network).
  • PDN Package Gateway function of Data Network
  • the PDN GW is responsible for the core control.
  • the operator controls various access modes through the PDN GW. Different access modes are connected to the PDN GW through their respective access gateway devices. For the 2G/3G access mode.
  • the serving GPRS Supporting Node (SGSN) is used to access the Serving GW and is connected to the PDN GW.
  • the E-UTRAN access mode is connected to the PDN GW through the Serving GW, and the PDN GW is accessed through the ePDG for the WLAN access mode.
  • the centralized control function of the PDN GW enables operators to manage mobile IP networks connected to different access technologies.
  • the Evolved Packet Data Gateway (ePDG) is mainly used for IP access to untrusted non-3GPP.
  • the untrusted non-3GPP IP access needs to be accessed by the ePDG to the PDN GW.
  • the 3GPP AAA interacts to authenticate and authorize these untrusted non-3 GPP IP accesses.
  • the charging processing method in the embodiment of the present invention adds a parameter SAE-Information, SAE-Information in the charging request CCR and the charging request response CCA service information Service-Info.
  • Table 1 and the access mode type SAE-RAT-Type and the handover time SAE-RAT-Handover-Time in Table 1 are added in the embodiment of the present invention.
  • SAP packet data association PDP type i.e. IP, PPP, or OM (Operation IHOSS: OSP. Context type must be selected)
  • PDP type for example: IP, PPP,
  • This field holds the PDP address of the served IMSI, i.e.
  • IPv4 or IPv6 IPv4 or IPv6. This parameter shall be present except when both the
  • PDP type is PPP and dynamic PDP address assignment is used.
  • the PDP address corresponding to the PDP-Address which can be an IP v4 or IP v6 address.
  • this parameter may not appear, and in other cases it appears in the bill.
  • This field records the quality of service configuration information of the PDN GW's executed line. -QoS-Profile
  • User International Mobile IMSI of the served party User ID M (Required) User International Mobile
  • Serving M (Required) Identifies the address of Serving GW
  • Network management address Identifies the address of the ePDG.
  • IMSI (first 5 or 6 digits, as user ID - mobile country code -
  • Network codebook field records the PDN GW described
  • SAE network service is connected to MSISDN/IMSI from creation to
  • MSISDN/IMSI this field identifies this specific PDP context from the creation of the PDN context to the deletion.
  • This field contains the identifier of the access point.
  • This field contains the connection point (APN) identifier that the user is connected to.
  • API connection point
  • This field records the IP address of the charging gateway. address
  • SAE selection mode NW-only SAE-Selection-Mo UE selection; de network side or UE selection;
  • This field records the charging characteristics of this PDP context contained in the Create PDP Context Request message.
  • This field indicates the name of a pre-defined group of PCC rules residing at the PCEF. It may occur several times within the PS
  • This field identifies a predefined set of Charging-Rule-Bas quotients.
  • Identify the wireless access technology which can be: Access mode type OC (Operation 3G, 2G
  • SAE-RAT-Type is optional) E-UTRAN, WLAN, Wimax, etc.
  • FIG. 2 it is a flowchart of a charging processing method according to an embodiment of the present invention, which includes the following steps:
  • the PDN GW receives a service data request of the UE.
  • the PDN GW sends an initial charging request to the OCS, where the initial charging request includes: a manner in which the UE currently accesses the PDN GW and/or a quota applied in the mode;
  • the OCS returns an initial charging request response to the PDN GW, where the initial charging request response includes: a quota allocated by the UE in the current PDN GW mode service, and a condition for triggering an intermediate charging request added by the quota.
  • the manner in which the UE accesses the PDN GW is changed.
  • the change of the radio access mode includes handover between a WLAN, an E-UTRAN, and a 2G/3G radio access mode, where the serving node is a Serving Gateway GW or an Evolved Packet Data Gateway ePDG.
  • the PDN GW After receiving the returned initial charging request response, the PDN GW monitors a change of a manner in which the UE accesses the PDN GW.
  • the PDN GW detects that the manner in which the UE accesses the PDN GW changes.
  • the first mode of accessing the PDN GW is changed to the second mode of accessing the PDN GW, and the intermediate charging request is sent to the OCS.
  • the method includes: the UE is in the first mode, that is, the former accessing the PDN GW.
  • the quota used, the second mode is the type of the new access PDN GW;
  • the intermediate charging request may further include a quota applied by the UE in a manner of newly accessing the PDN GW and a mode switching time of the newly accessed PDN GW.
  • the OCS extracts, from the intermediate charging request, the quota used by the UE in the manner of accessing the PDN GW, performs charging control, and performs quota reservation for the service in the new mode of accessing the PDN GW. Allocated quota;
  • the OCS performs charging control according to the used quota in the manner of accessing the PDN GW in the previous one of the intermediate charging requests, for example, performing deduction or other operations, according to the new access PDN in the charging request.
  • the mode type of the GW is determined by the service under the mode type of the newly accessed PDN GW.
  • the conversion of quotas must be implemented according to the batch price, for example, from traffic to duration. It should be noted that if the intermediate charging request does not include the quota used in the previous mode of accessing the PDN GW, the used quota is generally considered to be zero.
  • the OCS is based on the quota of the application, the used quota, and the account balance corresponding to the service of the UE in the database.
  • the service entered in the mode of the PDN GW determines the allocated quota. If the service of the previous mode of accessing the PDN GW is deducted, it is found that the remaining balance of the UE user's account balance minus the used quota is less than the applied quota, according to the operator's service to the service.
  • the charging policy back-calculating the remaining balance units, calculating the actual quota that can be allocated, or discovering that the remaining balance of the UE user's account balance minus the used quota can no longer support the UE to continue to use the service, Then, the UE is allocated a quota, and the service used by the UE will be interrupted.
  • the OCS performs charging control on the service in the manner of the original access PDN GW and the mode type of the new access PDN GW.
  • the switching time is used as a reference point.
  • the OCS returns an intermediate charging request response to the PDN GW, where the intermediate charging request response is Includes quotas allocated for new access to the PDN GW;
  • the PDN GW delivers service data in a new manner of accessing the PDN GW.
  • the PDN GW sends a final charging request to the OCS, where the final charging request includes the quota used by the user in the manner of the newly accessed PDN GW after the switching;
  • the OCS extracts the quota used by the user in the manner of newly accessing the PDN GW from the final charging request, and performs charging control.
  • the charging processing method in the embodiment of the present invention is illustrated by the online charging processing, but is not limited thereto.
  • the solution is also applicable to offline charging.
  • the offline charging does not affect the usage of the service.
  • the PDN GW reports the charging request to the offline charging system, it does not include the applied quota.
  • the offline charging system does not need to determine the allocated quota for the service of the UE.
  • the PDN GW also monitors the change of the manner in which the UE accesses the PDN GW.
  • the PDN GW detects that the UE accesses the PDN GW, the intermediate charging request is sent to the offline charging system.
  • the request includes: the usage amount of the UE in the manner of accessing the PDN GW, the type of the new access mode of the PDN GW, and the like.
  • the PDN GW sends a final charging request to the offline charging system, where the final charging request includes the user's new mode of accessing the PDN GW after the handover. Usage amount.
  • the offline charging system performs charging control according to the usage amount of the two received PDN GWs.
  • FIG. 3 it is a flowchart of a charging process after a UE establishes an E-UTRAN connection according to an embodiment of the present invention, including the following steps:
  • the UE sends uplink data.
  • the UE After the UE establishes an E-UTRAN connection, it sends uplink data.
  • the process of the UE establishing the E-UTRAN connection is as follows: The UE sends an attach Attach request to the MME through the eNodeB, and completes the authentication by using the MME to the HSS. After receiving the Attach request, the MME sends a create bearer Create default bearer request to the PDN GW through the Serving GW, and receives a Create default bearer response returned by the PDN GW, and then the MME returns an Attach to the eNodeB. response. The eNodeB then sends a request to establish a radio bearer layer to the UE. After receiving the setup radio 7 bearer response returned by the UE, the eNodeB returns a response of the 7-layer establishment completion to the MME.
  • Trigger-Type CHANGE— IN— RAT );
  • the PDN GW After receiving the returned initial charging request response, the PDN GW forwards the uplink data, and monitors a change in a manner of accessing the PDN GW.
  • the PDN GW receives the downlink data.
  • the PDN GW receives the transmission update 7 carrier request from the MME, and sends an update carrier request response to the MME. At this time, the PDN GW receives the downlink data.
  • the PDN GW sends the downlink data to the UE.
  • FIG. 4 it is a flow chart of the charging process of the E-UTRAN switching to the WLAN according to the embodiment of the present invention, including the steps:
  • the UE accesses the WLAN, and the PDN GW detects that the wireless access mode changes.
  • the uplink and downlink data in the network are transmitted, and the charging session between the PDN GW and the OCS is also in progress, and the UE switches from the E-UTRAN access mode to the WLAN access mode.
  • the handover process is as follows: The UE authenticates to the 3GPP AAA and the HSS through the ePDG, the HSS updates the routing information, the ePDG sends a bearer layer update request to the PDN GW, and receives the bearer layer update request response returned by the PDN GW, and then between the ePDG and the PDN GW.
  • the ePDG establishes a data channel with the UE, and the uplink and downlink data can be transmitted between the UE and the PDN GW. That is to say, after the radio access mode is changed, the UE originally accesses the PDN GW through the Serving GW, and now has become the PDN GW through the ePDG. At this time, the PDN GW detects that the radio access mode has changed.
  • -Handover-Time 200708090830 (8:30, August 9, 2007)
  • MSC Multiple-Services-Credit in E-UTRAN access mode
  • the OCS performs online charging control, performs charging control on the original wireless access mode service, and determines an allocated quota for the new wireless access mode.
  • the OCS After receiving the intermediate charging request CCR, the OCS extracts the used USU in the E-UTRAN receiving mode from the CCR, and performs charging control on the service in the E-UTRAN access mode, if the used USU is smaller than before.
  • the E-UTRAN access mode charging mode is based on traffic, and the WLAN access mode charging mode takes a long time. Therefore, the conversion of the quota from the traffic to the duration is required according to the price.
  • the switching time of the OCS to change the service in the original access mode and the mode in which the PDN GW is changed when the quota is allocated for the service in the new access mode is used as a reference point.
  • the charging mode here is exemplified by the calculation of the flow rate and the duration, or the charging by the event.
  • the PDN GW forwards service data (uplink data or downlink data).
  • the PDN GW sends a final charging request CCR to the OCS, where the final charging request includes the quota used by the user in the switched WLAN access mode.
  • USU 10 minutes:
  • the OCS extracts the quota used by the user in the WLAN access mode from the final charging request CCR, and performs charging control.
  • the manner in which the UE accesses the PDN GW changes includes: detecting a change in the radio access mode and/or a change in the serving node.
  • the radio access mode changes, and the manner in which the UE accesses the PDN GW changes, but the service node between the UE and the PDN GW changes. It may or may not change.
  • the radio access mode changes, and the Serving GW accessing the PDN GW may change or may remain unchanged.
  • the PDN GW accessing the PDN GW remains unchanged, since the E-UTRAN mode is switched to the 2G/3G access mode, the wireless data channel needs to be re-established, and the PDN GW is notified by the Serving GW, at this time, the PDN GW In other words, it detects that the UE wireless access mode has changed.
  • the specific process is as follows: The UE performs data transmission through the Serving GW and the PDN GW in the E-UTRAN mode, and the UE is ready to access the 2G/3G. In the network environment, the UE applies for access authentication to the target SGSN, and the target SGSN authenticates to the HSS through the Serving GW/MME.
  • the UE After the authentication, the UE establishes a data channel with the target SGSN, and the data channel is established between the target SGSN and the Serving GW, and then the Serving GW and the PDN GW update the data channel, and send information to the PDN GW that the UE access mode changes, then the PDN The GW detects that the UE wireless access mode has changed.
  • the radio access mode does not change, but the Serving GW accessing the PDN GW changes.
  • the UE switches between different Serving GWs in the same access mode, and the PDN GW is at this time.
  • the way in which the UE accesses the PDN GW is considered to have changed.
  • the specific process is as follows: The UE performs data transmission with the PDN GW through the source Serving GW.
  • the UE applies for access authentication to the target Serving GW, and the target Serving GW authenticates to the HSS through the PDN GW.
  • the UE After the authentication, the UE establishes a data channel with the target Serving GW, and the target Serving GW and the PDN GW update the data channel, and send information to the PDN GW that the manner in which the UE accesses the PDN GW changes, and the PDN GW detects that the UE accesses the PDN GW. The way has changed.
  • the storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), or a Random Acces s Memory (RAM).
  • the embodiment of the present invention provides a network system, and further provides a packet data network gateway and a charging system.
  • FIG. 5 is a schematic structural diagram of a network system according to an embodiment of the present invention.
  • the network system shown in Figure 5 includes a packet data network gateway 71 and a billing system 72.
  • a packet data network gateway 71 configured to detect, after the user terminal accesses the packet data network gateway 71, from the first mode to the second mode, sending, by the user terminal, the packet data network gateway 71 The second mode type of charging request.
  • the charging system 72 is configured to receive a charging request sent by the packet data network gateway 71, and calculate, according to the charging request, a method corresponding to the first manner in which the user terminal accesses the packet data network gateway 71.
  • the quota usage in the fee mode is used for charging control, and the charging session of the second mode is quotad according to the charging mode corresponding to the second mode in which the user terminal accesses the packet data network gateway 71. Reserved.
  • the structure of the packet data network gateway 71 also includes: a detecting unit 711 and a charging request unit 712.
  • the detecting unit 711 is configured to monitor a change of a manner in which the user terminal accesses the packet data network gateway 71.
  • the method for the detection unit 711 to obtain the newly added trigger charging request from the charging system 72 is that the manner in which the user terminal accesses the packet data network gateway 71 changes, and the user terminal is monitored according to the acquired condition.
  • the converting the first mode to the second mode includes: detecting a change of the wireless access mode and/or a change of the service node, wherein the user terminal accesses the packet data network gateway 71 through the service node.
  • the serving node is a Serving Gateway Serving GW or an Evolved Packet Data Gateway ePDG.
  • the charging requesting unit 712 is configured to: after the detecting unit 711 detects that the manner in which the user terminal accesses the packet data network gateway 71 is changed from the first mode to the second mode, send the user including the user to the charging system 72.
  • the terminal accesses the second mode type of charging request of the packet data network gateway 71.
  • the charging request sent by the charging requesting unit 712 to the charging system 72 further includes: a quota usage amount in a charging mode corresponding to the first mode in which the user terminal accesses the packet data network gateway 71 And a request quota amount in a charging mode corresponding to the second mode in which the user terminal accesses the packet data network gateway 71.
  • the structure of the billing system 72 includes: a receiving unit 721 and a processing unit 722.
  • the receiving unit 721 is configured to receive a second mode type charging request sent by the packet data network gateway 71 and the user terminal accessing the packet data network gateway 71.
  • the processing unit 722 is configured to: according to the charging request received by the receiving unit 721, to the user The terminal accesses the quota usage amount in the charging mode corresponding to the first mode of the packet data network gateway 71, and performs charging control according to the second mode in which the user terminal accesses the packet data network gateway 71. In the corresponding charging mode, quota reservation is performed on the charging session in the second mode.
  • the billing system 72 further includes: a condition setting unit 723, wherein the condition for newly triggering the charging request is changed in a manner that the user terminal accesses the packet data network gateway 71, and is sent to the packet data network gateway 71.
  • the technical solution of the embodiment of the present invention is to fully utilize the centralized control function of the packet data network gateway, and detect, by the packet data network gateway, a change of a manner in which the user terminal accesses the packet data network gateway, when detecting that the user terminal accesses the packet. After the mode of the data network gateway is changed from the first mode to the second mode, the charging system sends a charging request including the second mode type, and the charging system performs the user terminal according to the charging request.
  • the charging usage of the charging mode in the charging mode corresponding to the first mode of accessing the packet data network gateway is performed, and according to the second mode of the user terminal accessing the packet data network gateway In the fee mode, quota reservation is performed on the charging session in the second mode, so as to implement uninterrupted charging processing in a process in which the manner in which the user terminal accesses the packet data network gateway changes.
  • the charging processing method in the embodiment of the present invention may be applied to an online charging system OCS, and may also be applied to an offline charging system.
  • the charging request sent to the charging system may include: a second mode type of the packet data network gateway, a quota usage amount in a charging mode corresponding to the first mode in which the user terminal accesses the packet data network gateway, and/or a user terminal accessing the packet data network gateway.
  • the request quota amount in the charging mode corresponding to the second mode, and the time when the user terminal accesses the packet data network gateway from the first mode to the second mode can make the charging process more complete and accurate.

Description

计费处理方法和网络系统、 分组数据网络网关及计费系统 技术领域
本发明涉及通信网络领域， 具体涉及一种计费处理方法和网络系统、 分 组数据网络网关及计费系统。 背景技术
当前， 随着通信网络技术的进一步发展， 运营商为用户提供各种各样的 业务。 对于运营商提供的业务， 用户终端 UE可能釆用不同的接入方式， 因此 运营商会针对不同接入方式的特点通常会釆用不同的计费模式， 计费模式一 般包括按流量、 时长或事件进行计费等。 例如： 核心网系统架构演进 SAE ( System Architecture Evolution ) 中， 对于 UE 釆用演进通用无线接入网 E-UTRAN ( Evolved UMTS Terrestrial Radio Acces Network, UMTS陆地无线 接入网络）的接入方式， 运营商可以釆用基于流量的计费模式， 而对于 UE釆 用无线局域网接入网 WLAN ( Wireless Local Area Network ) 的接入方式， 运 营商釆用可以按时长的计费模式对用户进行计费。
现有技术中 SAE架构的计费架构可以釆用 E-UTRAN接入方式和 WLAN 接入方式。
对于 E-UTRAN接入方式，在线计费的釆集点设在分组数据网络网关 PDN GW, 从 PDN GW上搜集相应的承载层的计费信息上报给在线计费系统 OCS ( Online Charging System )进行计费控制， 例如进行扣费等操作。
对于 WLAN无线接入方式， 在线计费的釆集点可以设在 ePDG ( Evolved Packet Data Gateway )、 分组数据网络网关 PDN GW或 3 A认证服务器 3GPP AAA Server, 这些釆集点搜集 WLAN相应的承载层的计费信息， 上报给 OCS 进行计费控制， 例如进行扣费等操作。
在对现有技术的研究和实践过程中， 发明人发现现有技术存在以下问题： 现有技术中对于不同接入技术是在不同计费架构中分开进行计费控制的， 当 用户使用业务过程中， 接入方式发生切换时， 需要中断当前计费会话， 重新 接入到另一计费架构中进行计费控制， 无法实现切换过程中不间断的计费处 理。 发明内容
本发明实施例提供一种计费处理方法和网络系统、 分组数据网络网关及 计费系统， 能够实现用户终端接入分组数据网络网关的方式发生变化过程中 不间断的计费处理。
为解决上述技术问题， 本发明所提供的实施例是通过以下技术方案实现： 本发明实施例提供一种计费处理方法， 包括：
监控用户终端接入分组数据网络网关的方式的变化；
当检测到用户终端接入所述分组数据网络网关的方式从第一方式转为第 二方式时， 向计费系统发送含有所述第二方式类型的计费请求。
本发明实施例提供一种计费处理方法， 包括：
当用户终端接入分组数据网络网关的方式从第一方式转为第二方式后， 接收含有所述第二方式类型的计费请求； 根据所述计费请求， 对所述用户终端接入所述分组数据网络网关的第一 方式所对应的计费模式下的配额使用量进行计费控制， 并根据所述用户终端 接入所述分组数据网络网关的第二方式所对应的计费模式， 对所述第二方式 的计费会话进行配额预留。
本发明实施例提供一种网络系统， 包括： 分组数据网络网关， 用于检测 到用户终端接入所述分组数据网络网关的方式从第一方式转为第二方式后， 发送含有所述第二方式类型的计费请求； 计费系统， 用于接收所述分组数据 网络网关发送的计费请求， 根据所述计费请求， 对所述用户终端接入所述分 组数据网络网关的第一方式所对应的计费模式下的配额使用量进行计费控 制， 并根据所述用户终端接入所述分组数据网络网关的第二方式所对应的计 费模式， 对所述第二方式的计费会话进行配额预留。 本发明实施例提供一种分组数据网络网关， 包括： 检测单元， 用于监控 用户终端接入分组数据网络网关的方式的变化； 计费请求单元， 用于在检测 单元检测到用户终端接入所述分组数据网络网关的方式从第一方式转为第二 方式后， 向所述计费系统发送含有所述第二方式类型的计费请求。
本发明实施例提供一种计费系统， 包括： 接收单元， 用于接收分组数据 网络网关发送的含有所述用户终端接入所述分组数据网络网关的第二方式类 型的计费请求； 处理单元， 用于根据所述接收单元接收的计费请求， 对所述 用户终端接入所述分组数据网络网关的第一方式所对应的计费模式下的配额 使用量进行计费控制， 并根据所述用户终端接入所述分组数据网络网关的第 二方式所对应的计费模式， 对所述第二方式的计费会话进行配额预留。
从上述技术方案可以看出， 现有技术中对于不同接入技术是在不同计费 架构中分开进行计费控制的， 当接入方式发生切换时， 无法实现切换过程中 不间断的计费处理。 而本发明实施例技术方案是充分利用分组数据网络网关 的集中控制功能， 通过分组数据网络网关检测用户终端接入所述分组数据网 络网关的方式的变化， 当检测到用户终端接入所述分组数据网络网关的方式 从第一方式转为第二方式后， 向计费系统发送含有所述第二方式类型的计费 请求， 所述计费系统根据所述计费请求， 对所述用户终端接入所述分组数据 网络网关的第一方式所对应的计费模式下的配额使用量进行计费控制， 并根 据所述用户终端接入所述分组数据网络网关的第二方式所对应的计费模式， 对所述第二方式的计费会话进行配额预留， 从而实现用户终端接入分组数据 网络网关的方式发生变化的过程中不间断的计费处理。 附图说明
图 1是本发明实施例融合不同接入方式的计费架构示意图；
图 2是本发明实施例计费处理方法流程图；
图 3是本发明实施例 UE建立 E-UTRAN连接后计费处理流程图； 图 4是本发明实施例 E-UTRAN切换到 WLAN计费处理流程； 图 5是本发明实施例网络系统结构示意图。 具体实施方式
本发明实施例提供一种计费处理方法， 能够实现用户终端接入分组数据 网络网关的方式发生变化过程中不间断的计费处理。
在介绍本发明实施例计费处理方法前， 先介绍本发明实施例融合不同接 入方式的计费架构。请参阅图 1 , 是本发明实施例融合不同接入方式的计费架 构示意图。
图 1 的计费架构可以实现用户终端接入分组数据网络网关的方式发生变 化过程中不间断的计费处理。 图 1包括 E-UTRAN的接入网络、移动管理实体 MME、服务网关 Serving GW、 归属用户服务器 HSS、分组数据网络网关 PDN GW、 在线计费系统 OCS、 服务网络（例如 IMS网络）、 WLAN的接入网络、 3A认证服务器 3GPP AAA Server, WLAN的接入网络包括 WAG和 ePDG。 图 1中在线计费的釆集点统一设在 PDN GW, 从 PDN GW上搜集相应的承载层 的计费信息上 ^艮给 OCS进行计费控制。
需要说明的是，图 1只是以 E-UTRAN方式与 WLAN方式切换为例说明， 还可以是其他接入方式的切换， 例如从 E-UTRAN方式切换到 2G/3G接入方 式等。
SAE可以支持多种接入方式， 包括： 第二代移动通信网络 2G/第三代移动 通信网络 3G、 E-UTRAN以及 non-3GPP的 IP接入， non-3GPP的 IP接入分 为可信的和不可信的两种， 其中， 不可信的 non-3GPP的 IP接入需通过 ePDG 接入， WLAN属于不可信的 non-3GPP的 IP接入。 同时 SAE支持用户终端在 多种接入方式之间的切换，例如图 1所示用户终端可以由 E-UTRAN方式切换 到 WLAN方式。
以下对图 1中涉及的 SAE架构中的主要的功能实体进行简单介绍。
移动管理实体 MME( Mobility Management Entity ),主要处理移动性管理， 包括： 存储 UE控制面上下文， 其中包括用户标识 UEID、 用户的状态、 跟踪 区 TA ( Tracking Area )等； 进行移动性管理； 进行鉴权和密钥管理； 进行信 令的加密、 完整性保护； 管理和分配用户临时 ID等。 MME还承担控制信令 交互的功能， 可与归属用户服务器 HSS ( Home Subscriber Server ) 交互， 负 责用户身份的认证等。
服务网关 Serving GW, 主要负责用户平面数据的处理， 包括： 数据的路 由和转发； 进行数据头压缩； 存储 UE用户面上下文， 其中包括基本 IP承载 信息、 路由信息等。 Serving GW通过 MME建立了与基站的承载后， 负责用 户数据包的中继和路由。
分组数据网络网关 PDN GW, 主要负责系统间用户平面的处理， 包括： 处理不同接入系统间的用户面的切换； 数据的路由和转发； 计费数据收集； 实现连接到分组数据网络 PDN ( Package Data Network )的网关功能。 在 S AE 架构中， PDN GW负责核心控制， 运营商通过 PDN GW控制各种不同的接入 方式， 不同的接入方式通过各自的接入网关设备连入 PDN GW, 对于 2G/3G 接入方式使用服务支持节点 SGSN ( Serving GPRS Supporting Node )接入 Serving GW, 并连接到 PDN GW, 对于 E-UTRAN接入方式通过 Serving GW 连接到 PDN GW,而对于 WLAN接入方式通过 ePDG接入 PDN GW。 PDN GW 的集中控制功能，使得运营商能够对不同接入技术连接移动 IP网络进行管理。
演进分组数据网关 ePDG ( Evolved Packet Data Gateway ), 主要用于对不 可信的 non-3GPP的 IP接入， 不可信的 non-3GPP的 IP接入需通过 ePDG接 入到 PDN GW 上， ePDG通过与 3GPP AAA进行交互， 对这些不可信的 non-3 GPP的 IP接入进行认证和授权。
以下介绍本发明实施例计费处理方法， 本发明实施例计费处理方法在计 费请求 CCR和计费请求响应 CCA的服务信息 Service-Info中新增参数 SAE -Information, SAE-Information 的说明参见表 1 , 表 1 中的接入方式类型 SAE-RAT-Type和切换时间 SAE-RAT-Handover-Time为本发明实施例新增。
¾ I ^ I ¾ϊϊ I PDP context identifier used to identify this PDP context in different charging records created
SAE计费标识 OC (运营
by PDN GW.
SAE-Charging-ID 商可选）
用于在 PDN GW创建的不 同的计费记录中标识出不同的
PDP上下文
SAE分组数据协 PDP type, i.e. IP, PPP, or 议 OM (运营 IHOSS:OSP. 上下文类型 商必选 ) PDP类型， 例如： IP、 PPP,
SAE-PDP-Type 或 IHOSS: OSP协议
This field holds the PDP address of the served IMSI, i.e.
IPv4 or IPv6. This parameter shall be present except when both the
PDP type is PPP and dynamic 分组数据协议 PDP address assignment is used.
OC (运营
上下文地址 本字段记录所服务 IMSI号 商可选）
PDP-Address 对应的 PDP地址， 可以是 IP v4 或 IP v6地址。当 PDP类型为 PPP 并且使用动态 PDP地址分配时， 这个参数可以不出现， 在其他情 况下在话单中出现。
SAE-GPRS-协商 This field holds the QoS 月良务质量西己置 OC (运营 profile applied by PDN GW.
SAE-GPRS-Negoti 商可选） 该字段记录 PDN GW所执 ated 行的服务质量配置信息 -QoS-Profile
使用方国际移动 IMSI of the served party. 用户识别码 M (必选） 使用方国际移动
Served-IMSI 用户识别码 移动管理单元地
址 M (必选） 标识 MME的地址
MME-Address
服务网关地址
Serving M (必选） 标识 Serving GW的地址
GW-Address
分组数据网网关
地址 M (必选） 标识 PDN GW的地址
PDN GW-Address
演化的分组数据
OC (运营
网管地址 标识 ePDG的地址
商可选）
ePDG-Address
This field holds the MCC and
MNC extracted from the user's
SAE-国际移动用
IMSI (first 5 or 6 digits, as 户识别码-移动国家码-
OC (运营 applicable from the presented 移动网络码
商可选） IMSI).
SAE-IMSI-MCC- 本字段记录从用户 IMSI码
MNC
中解析出来的 MCC码与 MNC 码
SAE-分组数据网 This field holds the
OC (运营
网关-国际移动用户识 MCC-MNC of the network the 商可选）
别码 -移动国家码 -移动 PDN GW belongs to. 网络码 本字段记录 PDN GW所述
SAE-PDN 网络的 MCC-MNC码 GW-MCC-MNC
This field Identifies a particular PDP context for the associated PDN and
SAE网络服务接 MSISDN/IMSI from creation to
OC (运营
deletion.
入点标识
商可选） 在相应得 PDN网络和 SAE-NSAPI
MSISDN/IMSI中， 从 PDN上下 文的创建到删除， 本字段标识这 个特定的 PDP上下文
This field contains the identifier of the access point 被叫基站 ID OC (运营
(APN) the user is connected to. Called-Station-ID 商可选）
本字段包含用户所接入的 连接点 （APN )标识
This field indicates to the OCS that the last PDP context of a
SAE会话停止标
session is released and that the 识符 OC (运营
PDP session has been terminated. SAE-Session-Stop 商可选）
本字段指示 OCS,本次会话
-Indicator
最后的一个 PDP上下文已经释 放， 本次 PDP会话已经终止
This field holds the Charging 计费网关地址 OC (运营
Gateway IP address.
CG-Address 商可选）
本字段记录计费网关的 IP 地址
UE-only, UE/NW or
SAE选择模式 NW-only SAE-Selection-Mo UE选择； de 网络侧或 UE选择；
网络侧选择
This field contains the charging characteristics for this PDP Context received in the
3GPP计费特性
OC (运营 Create PDP Context Request 3GPP-Charging
商可选） Message
-Characteristics
本字段记录在创建 PDP上 下文请求消息中包含的本次 PDP上下文的计费特征
This field indicates the name of a pre-defined group of PCC rules residing at the PCEF. It may occur several times within the PS
Information field.
计费规则基本名 OC (运营
本字段标识预定义的一组 Charging-Rule-Bas 商可选）
e-Name 策略控制与计费（ PCC )的规则， 这些规则驻留在 PCEF上。 本字 段可以在 PS Information字段中 多次出现
SAE用户本地信
OC (运营 Tracking Area Identifier 息
商可选） 艮踪区标识
SAE-User-Locatio n-Info
标识无线接入技术， 可为： 接入方式类型 OC (运营 3G、 2G
SAE-RAT-Type 商可选） E-UTRAN、 WLAN、 Wimax 等
切换时间
OC (运营 记录 UE接入 PDN GW的方 SAE-RAT-Handover-Ti
商可选） 式发生变化的切换的时间 me
表 1
请参阅图 2, 是本发明实施例计费处理方法流程图， 包括步骤：
401、 PDN GW接收到 UE的业务数据请求；
402、 PDN GW向 OCS发送初始化计费请求， 该初始化计费请求中包括： UE的当前接入 PDN GW的方式和 /或在该方式下申请的配额；
403、 OCS向 PDN GW返回初始化计费请求响应， 该初始化计费请求响 应中包括： 为 UE在当前接入 PDN GW方式的业务所分配的配额 , 以及配额 新增的触发中间计费请求的条件设置为 UE接入 PDN GW的方式发生变化； 这里所说的 UE接入 PDN GW的方式发生变化包括： 检测到无线接入方 式的改变 （ Trigger-Type=CHANGE_IN_RAT ) 和 /或服务节点的改变 ( Trigger-Type=Serving— Node— Change )。 所述无线接入方式的改变包括 WLAN、 E-UTRAN及 2G/ 3G的无线接入方式间的切换， 所述服务节点为服 务网关 Serving GW或演进分组数据网关 ePDG。
404、 PDN GW接收返回的初始化计费请求响应后 ,监控 UE接入 PDN GW 的方式的变化；
405、 PDN GW检测到 UE接入 PDN GW的方式发生变化，从接入 PDN GW 的第一方式转为接入 PDN GW的第二方式，则向 OCS发送中间计费请求，该 中间计费请求中包括： UE在所述第一方式即前一种接入 PDN GW的方式下 已使用的配额， 所述第二方式即新接入 PDN GW的方式类型；
另外， 中间计费请求还可以进一步包括 UE在新接入 PDN GW的方式下 申请的配额和新接入 PDN GW的方式切换时间。
406、 OCS从中间计费请求中提取出 UE在前一种接入 PDN GW的方式 下使用的配额， 进行计费控制， 对新的接入 PDN GW的方式下的业务进行配 额预留即确定分配的配额；
OCS根据所述中间计费请求中的前一种接入 PDN GW的方式下已使用的 配额进行计费控制， 例如进行扣费或其他操作等， 根据所述计费请求中的新 接入 PDN GW的方式类型为所述新接入 PDN GW的方式类型下的业务确定分 配的配额。 当不同接入方式的计费模式不一样时， 需根据批价实现对配额的 转换， 例如从流量转换为时长。 需要说明的是， 如果所述中间计费请求中不 含有前一种接入 PDN GW的方式下已使用的配额， 则一般认为已使用的配额 为零。
如果中间计费请求中进一步包括携带新接入 PDN GW的方式下申请的配 额， OCS根据所述申请的配额、 已使用的配额及数据库中的对应该 UE的业 务的帐户余额为所述新接入 PDN GW的方式类型下的业务确定分配的配额。 如果对前一种接入 PDN GW的方式下的业务进行扣费后， 发现该 UE用户的 帐户余额减去已使用的配额后的剩余配额已经小于申请的配额， 则根据运营 商对该业务的计费策略， 对剩余的余额单元进行反算， 计算得到实际能够分 配的配额，或者发现该 UE用户的账户余额减去已使用的配额后的剩余配额已 不能支持 UE继续使用业务， 则不会再为 UE分配配额， UE使用的业务将被 中断。
如果计费请求中进一步包括携带接入 PDN GW的方式发生变化的切换时 间， OCS对原接入 PDN GW的方式下的业务进行计费控制和为所述新接入 PDN GW的方式类型下的业务确定分配的配额时以该切换时间为参考点。
407、 OCS向 PDN GW返回中间计费请求响应， 该中间计费请求响应中 包括对新的接入 PDN GW的方式下分配的配额；
408、 PDN GW在新的接入 PDN GW的方式下传递业务数据；
409、 UE使用业务完毕后， PDN GW向 OCS发送最终计费请求， 该最终 计费请求中包括用户在所述切换后的新接入 PDN GW 的方式下已使用的配 额；
410、 OCS从最终计费请求中提取出用户在新接入 PDN GW的方式下使 用的配额， 进行计费控制。
需要说明的是， 本发明实施例计费处理方法以在线计费处理举例说明但 不局限于此， 此方案也可适用于离线计费。 离线计费不影响业务的使用过程， PDN GW向离线计费系统上报计费请求时， 不包括申请的配额， 离线计费系 统也不需要为 UE的业务确定分配的配额。 在离线计费时， PDN GW也监控 UE接入 PDN GW的方式的变化， 当 PDN GW检测到 UE接入 PDN GW的方 式发生变化， 向离线计费系统发送中间计费请求， 该中间计费请求中包括： UE在前一种接入 PDN GW的方式下使用量，新接入 PDN GW的方式类型等。 当 UE在新接入 PDN GW的方式下使用业务完毕后， PDN GW向离线计费系 统发送最终计费请求， 该最终计费请求中包括用户在切换后的新接入 PDN GW的方式下的使用量。 离线计费系统根据接收到的两种接入 PDN GW的方 式下的使用量， 进行计费控制。
请参阅图 3 ,是本发明实施例 UE建立 E-UTRAN连接后计费处理流程图， 包括步骤：
501、 UE发送上行数据；
UE建立 E-UTRAN连接后， 发送上行数据。
UE建立 E-UTRAN连接的过程如下： UE通过 eNodeB向 MME发送附着 Attach请求， 并通过 MME到 HSS上完成认证。 MME接收 Attach请求后通 过 Serving GW向 PDN GW发送创建承载 Create default bearer请求， 并接收 PDN GW返回的 Create default bearer响应， 然后 MME向 eNodeB返回 Attach 响应。 接着 eNodeB向 UE发送建立无线承载层请求， 当接收 UE返回的建立 无线 7 载层响应后， eNodeB向 MME返回 7 载层建立完成的响应。
502、 PDN GW接收 UE发送的业务请求后， 向 OCS发送初始化计费请 求 CCR , 该初始化计费请求中包括： SAE-Information 中的接入方式类型 SAE-RAT-Type=E-UTRAN , 申请的配额 RSU=10M流量；
503、 OCS接收初始化计费请求后， 进行在线计费控制， 根据数据库中对 应该 UE的帐户余额确定分配的配额 GSU = 10M;
504、 OCS向 PDN GW返回初始化计费请求响应 CCA, 该请求中包括分 配的配额 GSU=10M, 还包括配额新增的触发中间计费请求的条件设置为 UE 接入 PDN GW的方式发生变化（ Trigger-Type=CHANGE— IN— RAT );
505、 PDN GW接收返回的初始化计费请求响应后， 将上行数据转发， 并 监控接入 PDN GW的方式的改变；
506、 PDN GW接收到下行数据；
PDN GW接收到 MME的发送更新 7 载层请求， 向 MME发送更新 载 层请求响应， 此时， PDN GW接收到下行数据。
507、 PDN GW 向 OCS 发送中间计费请求 CCR , 该请求中包括： SAE-Information 中的接入方式类型 SAE-RAT-Type=E-UTRAN, 申请的配额 RSU=15M流量；
508、 OCS接收中间化计费请求后， 进行在线计费控制， 根据数据库中对 应该 UE的帐户余额确定分配的配额 GSU = 15M;
509、 计费系统向 PDN GW返回中间计费请求响应 CCA, 该请求中包括 分配的配额 GSU=15M;
510、 PDN GW将下行数据发送到 UE。
请参阅图 4, 是本发明实施例 E-UTRAN切换到 WLAN的计费处理流程 图， 包括步骤：
601、 UE接入 WLAN , PDN GW检测到无线接入方式发生了变化； 网络中上行和下行数据在传送， PDN GW与 OCS的计费会话也在进行， 而 UE从 E-UTRAN接入方式切换到 WLAN接入方式。切换过程如下： UE通 过 ePDG向 3GPP AAA和 HSS进行认证，则 HSS更新路由信息， ePDG向 PDN GW发送承载层更新请求， 并接收 PDN GW返回的承载层更新请求响应， 然 后 ePDG与 PDN GW之间建立数据通道， ePDG再与 UE之间建立数据通道， 则 UE与 PDN GW之间的可以进行上行和下行数据的传输。 也就是说， 无线 接入方式变化后， UE原来通过 Serving GW接入 PDN GW,现在已变成通过 ePDG接入 PDN GW, 此时， PDN GW检测到无线接入方式发生了变化。
602、 PDN GW 向 OCS 发送中间计费请求 CCR, 计费请求中包括： SAE-Information中的业务接入类型 SAE-RAT-Type=WLAN,接入 PDN GW的 方式发生变化的切换时间 SAE-RAT-Handover-Time=200708090830 ( 2007年 8 月 9日 8时 30分），在 E-UTRAN接入方式下 MSCC Multiple-Services-Credit
-Control, 多个业务信用户控制参数）中的已使用配额 USU=3M, 上报使 用 配 额 的 原 因 （ 批 价 改 变 ， Reporting Reason=RATING— CONDITION— CHANGE ), 触发上报使用配额的原因 （接入 方式改变， Trigger-Type=CHANGE— IN— RAT ), 在 WLAN接入方式下 MSCC2 中的申请的配额 RSU=10分钟；
603、 OCS进行在线计费控制， 对原无线接入方式业务进行计费控制， 为 新无线接入方式确定分配的配额；
OCS接收中间计费请求 CCR后， 从 CCR中提取出 E-UTRAN接收方式 下的已使用的配额 USU, 对 E-UTRAN接入方式下的业务进行计费控制， 如 果已使用的配额 USU小于之前为该业务下发的分配的配额 GSU,则进行回补， 即将所述 GSU减去 USU的配额返回给 UE;从中间计费请求 CCR中获取 UE 的新的无线接入方式 SAE-RAT-Type=WLAN及在 WLAN接入方式下 MSCC2 中的申请的配额 RSU等信息， 对 WLAN接入方式下的业务确定分配的配额 GSU=10分钟。 因为 E-UTRAN接入方式和 WLAN接入方式的计费模式不一 样， E-UTRAN接入方式计费模式基于流量， WLAN接入方式计费模式釆用时 长， 所以这里需根据批价实现对配额从流量到时长的转换。 OCS对原接入方 式下的业务进行计费控制和为所述新接入方式类型下的业务分配配额时以接 入 PDN GW的方式发生变化的切换时间为参考点。 需说明的是， 这里计费模 式是以按流量和时长计算举例说明， 也可以是按事件进行计费。
604、 OCS向 PDN GW返回中间计费请求响应 CCA, 该中间计费请求响 应中包括： 在 WLAN接入方式下 MSCC2中确定分配的配额 GSU=10分钟；
605、 PDN GW转发业务数据（上行数据或下行数据）；
606、 UE使用业务完毕后， PDN GW向 OCS发送最终计费请求 CCR, 该最终计费请求中包括用户在所述切换后的 WLAN接入方式下已使用的配额 USU=10分钟：
607、 OCS从最终计费请求 CCR中提取出用户在 WLAN接入方式下使用 的配额， 进行计费控制。
需要说明的是， 上述内容是以 E-UTRAN切换到 WLAN为例进行说明， 如果是从 WLAN切换到 E-UTRAN, 其原理是相同的。
另夕卜， 前面已提到 PDN GW监控 UE接入 PDN GW的方式的变化， 所述 UE接入 PDN GW的方式发生变化包括： 检测到无线接入方式的改变和 /或服 务节点的改变。 当 E-UTRAN、 WLAN及 2G/3G接入方式之间进行切换时 , 无线接入方式发生了变化， 则 UE接入 PDN GW的方式也就变化了， 但 UE 与 PDN GW之间的服务节点可能变化， 也可能不变。 例如从 E-UTRAN方式 切换到 2G/3G接入方式时， 无线接入方式发生了变化， 而接入 PDN GW的 Serving GW可能会发生变化，也可能保持不变。虽然接入 PDN GW的 Serving GW保持不变， 但因为是从 E-UTRAN方式切换到 2G/3G接入方式， 需要重 新建立无线数据通道， 并由 Serving GW通知 PDN GW, 所述此时 PDN GW 也就检测到 UE无线接入方式发生了变化。 具体过程如下： UE在 E-UTRAN 方式下通过 Serving GW与 PDN GW进行数据传输，此时 UE准备接入到 2G/3G 网络环境， 则 UE向目标 SGSN申请接入认证， 由目标 SGSN通过 Serving GW/MME向 HSS进行认证。 通过认证后 UE与目标 SGSN间建立数据通道， 而目标 SGSN与 Serving GW之间建立数据通道，然后 Serving GW与 PDN GW 更新数据通道，并向 PDN GW发送 UE接入方式发生变化的信息，则 PDN GW 检测到 UE无线接入方式发生了变化。
还有一种情况， 就是无线接入方式没有发生变化， 但接入 PDN GW 的 Serving GW发生变化， 例如漫游时， UE在同一种接入方式下的不同 Serving GW之间进行切换，此时 PDN GW认为 UE接入 PDN GW的方式发生了变化。 具体过程如下： UE通过源 Serving GW与 PDN GW进行数据传输， 当 UE漫 游到目标 Serving GW网络环境中， 则 UE向目标 Serving GW申请接入认证， 目标 Serving GW通过 PDN GW向 HSS进行认证， 通过认证后 UE与目标 Serving GW间建立数据通道，而目标 Serving GW与 PDN GW更新数据通道， 并向 PDN GW发送 UE接入 PDN GW的方式发生变化的信息， 则 PDN GW 检测到 UE接入 PDN GW的方式发生了变化。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分流 程， 是可以通过计算机程序来指令相关的硬件来完成， 所述的程序可存储于 一计算机可读取存储介质中， 该程序在执行时， 可包括如上述各方法的实施 例的流程。其中，所述的存储介质可为磁碟、光盘、只读存储记忆体（ Read-Only Memory, ROM )或随机存储记忆体 ( Random Acces s Memory, RAM )等。
上述内容详细介绍了本发明实施例计费处理方法， 相应的， 本发明实施 例提供一种网络系统， 还提供一种分组数据网络网关和计费系统。
请参阅图 5, 是本发明实施例网络系统结构示意图。
图 5所示网络系统包括分组数据网络网关 71和计费系统 72。
分组数据网络网关 71 , 用于检测到用户终端接入所述分组数据网络网关 71 的方式从第一方式转为第二方式后， 发送含有所述用户终端接入所述分组 数据网络网关 71的第二方式类型的计费请求。 计费系统 72 , 用于接收所述分组数据网络网关 71发送的计费请求，根据 所述计费请求， 对所述用户终端接入所述分组数据网络网关 71的第一方式所 对应的计费模式下的配额使用量进行计费控制， 并根据所述用户终端接入所 述分组数据网络网关 71的第二方式所对应的计费模式， 对所述第二方式的计 费会话进行配额预留。
分组数据网络网关 71的结构也请参阅图 5 , 包括： 检测单元 711和计费 请求单元 712。
检测单元 711 , 用于监控用户终端接入分组数据网络网关 71的方式的变 化。 所述检测单元 711从所述计费系统 72获取新增的触发计费请求的条件为 用户终端接入所述分组数据网络网关 71的方式发生变化， 根据所述获取的条 件监控用户终端接入所述分组数据网络网关 71的方式的变化。 所述检测单元 第一方式转为第二方式包括： 检测到无线接入方式的改变和 /或服务节点的改 变， 其中， 所述用户终端通过服务节点接入所述分组数据网络网关 71。 所述 服务节点为服务网关 Serving GW或演进分组数据网关 ePDG。
计费请求单元 712 ,用于在检测单元 711检测到用户终端接入所述分组数 据网络网关 71 的方式从第一方式转为第二方式后， 向所述计费系统 72发送 含有所述用户终端接入所述分组数据网络网关 71 的第二方式类型的计费请 求。所述计费请求单元 712向所述计费系统 72发送的计费请求中进一步包括： 用户终端接入所述分组数据网络网关 71的第一方式所对应的计费模式下的配 额使用量和 /或用户终端接入所述分组数据网络网关 71 的第二方式所对应的 计费模式下的请求配额量。
计费系统 72的结构也请参阅图 5 , 包括： 接收单元 721和处理单元 722。 接收单元 721 , 用于接收分组数据网络网关 71发送的含有所述用户终端 接入所述分组数据网络网关 71的第二方式类型的计费请求。
处理单元 722 , 用于根据所述接收单元 721接收的计费请求，对所述用户 终端接入所述分组数据网络网关 71的第一方式所对应的计费模式下的配额使 用量进行计费控制， 并根据所述用户终端接入所述分组数据网络网关 71的第 二方式所对应的计费模式， 对所述第二方式的计费会话进行配额预留。
计费系统 72进一步包括： 条件设置单元 723 , 用于新增触发计费请求的 条件为用户终端接入所述分组数据网络网关 71的方式发生变化， 并发送给所 述分组数据网络网关 71。
综上所述， 现有技术中对于不同接入技术是在不同计费架构中分开进行 计费控制的， 当接入方式发生切换时， 无法实现切换过程中不间断的计费处 理。 而本发明实施例技术方案是充分利用分组数据网络网关的集中控制功能， 通过分组数据网络网关检测用户终端接入所述分组数据网络网关的方式的变 化， 当检测到用户终端接入所述分组数据网络网关的方式从第一方式转为第 二方式后， 向计费系统发送含有所述第二方式类型的计费请求， 所述计费系 统根据所述计费请求， 对所述用户终端接入所述分组数据网络网关的第一方 式所对应的计费模式下的配额使用量进行计费控制， 并根据所述用户终端接 入所述分组数据网络网关的第二方式所对应的计费模式， 对所述第二方式的 计费会话进行配额预留， 从而实现用户终端接入分组数据网络网关的方式发 生变化的过程中不间断的计费处理。
进一步， 本发明实施例计费处理方法可以适用于在线计费系统 OCS, 也 可以适用于离线计费系统。 应用于在线系统 OCS时， 当检测到用户终端接入 所述分组数据网络网关的方式从第一方式转为第二方式时， 向计费系统发送 的计费请求可以包括： 用户终端接入所述分组数据网络网关的第二方式类型、 用户终端接入所述分组数据网络网关的第一方式所对应的计费模式下的配额 使用量和 /或用户终端接入所述分组数据网络网关的第二方式所对应的计费模 式下的请求配额量， 用户终端接入所述分组数据网络网关的方式从第一方式 转为第二方式的时间， 可以使得计费处理过程更加完善和准确。
以上对本发明实施例所提供的计费处理方法和网络系统、 分组数据网络 网关及计费系统进行了详细介绍， 对于本领域的一般技术人员， 依据本发明 实施例的思想， 在具体实施方式及应用范围上均会有改变之处， 综上所述， 本说明书内容不应理解为对本发明的限制。

Claims

权 利 要求 书
1、 一种计费处理方法， 其特征在于， 包括：
监控用户终端接入分组数据网络网关的方式的变化；
当检测到用户终端接入所述分组数据网络网关的方式从第一方式转为第二 方式时， 向计费系统发送含有所述第二方式类型的计费请求。
2、 根据权利要求 1所述的计费处理方法， 其特征在于： 所述监控用户终端 接入分组数据网络网关的方式的变化的步骤包括：
检测到无线接入方式的改变和 /或服务节点的改变， 其中， 所述用户终端通 过服务节点接入所述分组数据网络网关。
3、 根据权利要求 2所述的计费处理方法， 其特征在于：
所述无线接入方式的改变包括无线局域网接入网 WLAN、 演进通用无线接 入网 E-UTRAN及第二代移动通信网络 2G/第三代移动通信网络 3G的无线接入 方式间的切换， 所述服务节点为服务网关 Serving GW 或演进分组数据网关 ePDG„
4、 根据权利要求 1所述的计费处理方法， 其特征在于：
所述发送的计费请求中进一步包括： 所述用户终端接入所述分组数据网络 网关的第一方式所对应的计费模式下的配额使用量和 /或所述用户终端接入所述 分组数据网络网关的第二方式所对应的计费模式下的请求配额量。
5、 根据权利要求 4所述的计费处理方法， 其特征在于：
所述发送的计费请求中进一步包括： 用户终端接入所述分组数据网络网关 的方式从第一方式转为第二方式的时间。
6、 一种计费处理方法， 其特征在于， 包括：
当用户终端接入分组数据网络网关的方式从第一方式转为第二方式后， 接 收含有所述第二方式类型的计费请求；
根据所述计费请求， 对所述用户终端接入所述分组数据网络网关的第一方 式所对应的计费模式下的配额使用量进行计费控制， 并根据所述用户终端接入 所述分组数据网络网关的第二方式所对应的计费模式， 对所述第二方式的计费 会话进行配额预留。
7、 根据权利要求 6所述的计费处理方法， 其特征在于：
所述当用户终端接入分组数据网络网关的方式从第一方式转为第二方式 后， 接收含有所述第二方式类型的计费请求的步骤之前， 还包括：
新增触发计费请求的条件为用户终端接入所述分组数据网络网关的方式发 生变化， 并发送触发计费请求的条件。
8、 根据权利要求 6所述的计费处理方法， 其特征在于：
所述接收的计费请求中进一步包括： 所述用户终端接入所述分组数据网络 网关的第一方式所对应的计费模式下的配额使用量和 /或所述用户终端接入所述 分组数据网络网关的第二方式所对应的计费模式下的请求配额量。
9、 根据权利要求 8所述的计费处理方法， 其特征在于：
所述接收的计费请求中进一步包括： 用户终端接入所述分组数据网络网关 的方式从第一方式转为第二方式的时间， 相应的，
所述计费系统对所述用户终端接入所述分组数据网络网关的第一方式所对 应的计费模式下的配额使用量进行计费控制时， 以该时间为参考点。
10、 根据权利要求 9所述的计费处理方法， 其特征在于：
所述计费模式包括按流量、 时长或事件进行计费。
11、 一种网络系统， 其特征在于， 包括：
分组数据网络网关（ 71 ), 用于检测到用户终端接入所述分组数据网络网关 的方式从第一方式转为第二方式后， 发送含有所述第二方式类型的计费请求； 计费系统（72 ), 用于接收所述分组数据网络网关发送的计费请求， 根据所 述计费请求， 对所述用户终端接入所述分组数据网络网关的第一方式所对应的 计费模式下的配额使用量进行计费控制， 并根据所述用户终端接入所述分组数 据网络网关的第二方式所对应的计费模式， 对所述第二方式的计费会话进行配 额预留。
12、 根据权利要求 11所述的网络系统， 其特征在于， 所述分组数据网络网 关 （71 ) 包括：
检测单元（711 ), 用于从所述计费系统获取新增的触发计费请求的条件为 用户终端接入所述分组数据网络网关的方式发生变化， 根据所述获取的条件监 控用户终端接入所述分组数据网络网关的方式的变化；
计费请求单元（712 ), 用于在检测单元检测到用户终端接入所述分组数据 网络网关的方式从第一方式转为第二方式后， 向所述计费系统发送含有所述第 二方式类型的计费请求。
13、 根据权利要求 11所述的网络系统， 其特征在于：
所述计费请求单元（712 ) 向所述计费系统（72 )发送的计费请求中进一步 包括： 用户终端接入所述分组数据网络网关的第一方式所对应的计费模式下的 配额使用量和 /或用户终端接入所述分组数据网络网关的第二方式所对应的计费 模式下的请求配额量。
14、 根据权利要求 11至 13任一项所述的网络系统， 其特征在于， 所述计 费系统（72 ) 包括：
条件设置单元（ 723 ), 用于新增触发计费请求的条件为用户终端接入所述 分组数据网络网关的方式发生变化， 并将触发计费请求的条件发送给所述分组 数据网络网关；
接收单元（721 ), 用于接收所述分组数据网络网关发送的计费请求； 处理单元（ 723 ), 用于根据所述接收单元接收的计费请求， 对所述用户终 端接入所述分组数据网络网关的第一方式所对应的计费模式下的配额使用量进 行计费控制， 并根据所述用户终端接入所述分组数据网络网关的第二方式所对 应的计费模式， 对所述第二方式的计费会话进行配额预留。
15、 一种分组数据网络网关， 其特征在于， 包括：
检测单元（711 ), 用于监控用户终端接入分组数据网络网关的方式的变化； 计费请求单元（712 ), 用于在检测单元检测到用户终端接入所述分组数据 网络网关的方式从第一方式转为第二方式后， 发送含有所述第二方式类型的计 费请求。
16、 根据权利要求 15所述的分组数据网络网关， 其特征在于：
所述检测单元（711 )还用于， 获取新增的触发计费请求的条件为用户终端 接入所述分组数据网络网关的方式发生变化， 根据所述获取的条件监控用户终 端接入所述分组数据网络网关的方式的变化。
17、 根据权利要求 15或 16所述的分组数据网络网关， 其特征在于： 所述检测单元检测 （ 711 )到用户终端接入所述分组数据网络网关的方式从 第一方式转为第二方式包括：检测到无线接入方式的改变和 /或服务节点的改变， 其中， 所述用户终端通过服务节点接入所述分组数据网络网关。
18、 根据权利要求 15所述的分组数据网络网关， 其特征在于：
所述计费请求单元（712 )发送的计费请求中进一步包括： 用户终端接入所 述分组数据网络网关的第一方式所对应的计费模式下的配额使用量和 /或用户终 端接入所述分组数据网络网关的第二方式所对应的计费模式下的请求配额量。
19、 一种计费系统， 其特征在于， 包括：
接收单元（721 ), 用于当用户终端接入分组数据网络网关的方式从第一方 式转为第二方式时， 接收含有用户终端接入所述分组数据网络网关的第二方式 类型的计费请求；
处理单元（722 ), 用于根据所述接收单元接收的计费请求， 对所述用户终 端接入所述分组数据网络网关的第一方式所对应的计费模式下的配额使用量进 行计费控制， 并根据所述用户终端接入所述分组数据网络网关的第二方式所对 应的计费模式， 对所述第二方式的计费会话进行配额预留。
20、 根据权利要求 19所述的计费系统， 其特征在于， 进一步包括： 条件设置单元（ 723 ), 用于新增触发计费请求的条件为用户终端接入所述 分组数据网络网关的方式发生变化， 并发送触发计费请求的条件。
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