WO2011097880A1 - 一种业务流建立方法和系统 - Google Patents

一种业务流建立方法和系统 Download PDF

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Publication number
WO2011097880A1
WO2011097880A1 PCT/CN2010/076422 CN2010076422W WO2011097880A1 WO 2011097880 A1 WO2011097880 A1 WO 2011097880A1 CN 2010076422 W CN2010076422 W CN 2010076422W WO 2011097880 A1 WO2011097880 A1 WO 2011097880A1
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WIPO (PCT)
Prior art keywords
service flow
agw
establishment
handover
authenticator
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PCT/CN2010/076422
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English (en)
French (fr)
Inventor
庞在海
刘俊羿
蔡建楠
Original Assignee
中兴通讯股份有限公司
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Publication of WO2011097880A1 publication Critical patent/WO2011097880A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup

Definitions

  • the present invention relates to the field of communications, and more particularly to a method and system for establishing a service flow in a Worldwide Interoperability for Microwave Access (WiMAX) system. Background technique
  • WiMAX Worldwide Interoperability for Microwave Access
  • the network reference model of WiMAX (Worldwide Interoperability for Microwave Access, WiMAX-based wireless metropolitan area network technology based on IEEE802.16 standard) is shown in Figure 1.
  • the CSN Connectivity Service Network, CSN for short
  • the MS/SS Mobile Station/Subscriber Station for short
  • the ASN Access Service Network, ASN for short
  • the connection between the ASNs passes through the R4 port. In the ASN, it can be refined.
  • the AGW ASN Gateway, ASN Convergence Gateway, or ASN-GW
  • the BS Base Station
  • ASN-GW ASN Gateway, ASN Convergence Gateway, or ASN-GW
  • BS Base Station
  • a series of control and bearer plane protocols Further subdivided, the ASN-GW includes an authentication and authorization physical entity (Authenticator) and a channel management physical entity (DPF) location management physical entity (PC/LR).
  • Authenticator authentication and authorization physical entity
  • DPF channel management physical entity
  • PC/LR location management physical entity
  • the three physical entities may be in the same physical entity, or On different physical entities.
  • the BS mainly provides functions such as radio resource management, power measurement and control, and compression and encryption of air interface data.
  • the Authenticator in the ASN-GW mainly provides authentication, authorization, and accounting functions.
  • the DPF mainly provides channel management to assist the establishment of the upper layer and the MS. 3 layer connection and other functions
  • PC LR mainly provides location management, paging and other functions;
  • CSN mainly includes Home Agent (HA), Dynamic Host Configuration Protocol (DHCP) server, and Authentication/Authorization/Accounting (AAA) server and other physical entities, mainly providing accounting, authentication, authorization, assigning IP addresses, and accessing Internet services.
  • HA Home Agent
  • DHCP Dynamic Host Configuration Protocol
  • AAA Authentication/Authorization/Accounting
  • a service flow (also referred to as a data channel or channel) is established between the BS and the AGW.
  • ISF Initial Service Flow
  • PSF Prepared Service Flow
  • Layer 3 signaling (such as DHCP signaling) must be transmitted in the ISF stream. If the user's ISF flow fails to be established, the user's access fails. Certain services (such as voice) can go through the PSF stream. By establishing multiple service flows, users can make different services take different PSF flows (such as video, voice, etc.) and ensure the smooth progress of each service.
  • the following describes the existing handover process in the current protocol in combination with the architecture. All the handover scenarios in the existing protocol are based on the completion of the user's service flow establishment. In the actual environment, the user will switch during the process of establishing the service flow. The following describes the architecture system to explain the problem of switching the existing service flow establishment process in the current protocol.
  • Figure 3 shows the process of establishing service flows between DPF and Authenticator on different physical entities in the existing protocol.
  • the Authenticator sends a resource reservation request message to the DPF according to the information of the authorized service flow, requesting resource reservation;
  • the DPF constructs a channel establishment request to the BS according to the resource reservation request message, and requests the establishment of the channel and the resource reservation;
  • the BS sends a channel establishment request to the MS.
  • the MS After receiving the channel establishment request, the MS sends a channel establishment response to the BS.
  • the BS sends a channel setup response to the DPF.
  • the DPF After receiving the successful channel establishment response, the DPF sends a successful resource reservation response to the Authenticator.
  • the DPF sends a channel establishment confirmation to the BS;
  • 308 The Authenticator sends a resource reservation confirmation to the DPF after receiving the resource reservation response.
  • Figure 4 shows the process of establishing the service flow of the DPF and Authenticator on the same physical entity in the existing protocol.
  • the AGW sends a channel establishment request to the BS, requesting channel establishment and resource reservation;
  • the BS sends a channel establishment request to the MS.
  • the MS After receiving the channel establishment request, the MS sends a channel establishment response to the BS.
  • the BS sends a channel setup response to the AGW.
  • the AGW After receiving the successful channel establishment response, the AGW sends a channel establishment confirmation to the BS.
  • the BS or the DPF In the process of establishing a PSF flow, if the DPF switches before the resource reservation request message of the Authenticator is received, or the MS switches before the BS receives the channel establishment request, the BS or the DPF is processing the handover process and cannot process the establishment.
  • the service flow request at this time, the BS or DPF will send a failed response to the DPF or Authenticator, causing the PSF flow to fail to be established. If there is still no PSF flow established at this time, in the process of establishing a subsequent PSF flow, if the handover does not end, the PSF flow will fail to be established.
  • the BS or the AGW is processing the handover procedure, and cannot process the request for establishing the service flow, resulting in the PSF.
  • Flow creation failed. If there is still no PSF flow established at this time, in the process of establishing a subsequent PSF flow, if the handover is not completed, the PSF flow will fail to be established.
  • the switch fails to be processed according to the protocol process, causing the AGW to release the user.
  • the user can connect to the network only after re-access, which affects the user's access success rate and user experience.
  • the technical problem to be solved by the present invention is to provide a WIMA service flow establishing method and system to improve user satisfaction.
  • the present invention provides a service flow establishing method, including: when an access service network aggregation gateway (AGW) establishes a service flow, when the AGW detects that the service flow establishment fails or senses the terminal handover, the AGW terminates.
  • AGW access service network aggregation gateway
  • the AGW re-initiates the establishment process of the service flow when receiving the handover complete message sent by the target base station that is switched by the terminal before the preset time is exceeded;
  • the AGW re-initiates the establishment process of the service flow when receiving the handover complete message sent by the target base station of the terminal handover in the process of establishing the service flow.
  • the above method may also have the following feature: the service flow is an initial service flow or a preliminary service flow.
  • the method may further include the following feature: when the service flow is a preliminary service flow, the method further includes: if the AGW does not receive the handover complete message sent by the target base station before the preset time exceeds the preset time, After the preset time, the AGW re-initiates the establishment process of the service flow.
  • the foregoing method may further have the following feature: when the service flow is an initial service flow, when the AGW detects that the service flow fails to be established, the AGW terminates the establishment process of the service flow; when the service flow is a preliminary service flow When the AGW detects the terminal handover, the AGW terminates the establishment process of the service flow.
  • the above method may also have the following features:
  • the AGW senses that the service flow establishment fails by:
  • the AGW sends a channel establishment request to the base station, and the base station sends a channel establishment request to the terminal.
  • the AGW does not receive the channel setup response or receives the failed channel setup response, the AGW detects that the service flow establishment fails.
  • the foregoing method may also be characterized in that the service flow is an initial service flow, and the AGW includes a channel management physical entity (DPF) and an authentication and authorization physical entity (Authenticator) located in different physical entities, and the AGW is perceived as follows: Failure to establish a business flow:
  • DPF channel management physical entity
  • Authenticator authentication and authorization physical entity
  • the Authenticator sends a resource reservation request message to the DPF, and the DPF sends a channel establishment request to the base station;
  • the DPF When the DPF does not receive the channel setup response or the failed channel setup response, the DPF sends a failed resource reservation response to the Authenticator;
  • the Authenticator After the Authenticator receives the failed resource reservation response, the Authenticator detects that the service flow establishment fails.
  • the AGW includes a DPF and an Authenticator located in different physical entities, and when the AGW senses the terminal handover, the AGW terminates the establishment process of the service flow, including:
  • the terminal Before the DPF sends a channel establishment request, or after the channel establishment request is sent, the terminal is aware that the terminal is in the handover, and the DPF fails to send the resource reservation response to the Authenticator, and the failure reason is handover;
  • the Authenticator After receiving the failed resource reservation response, the Authenticator learns that the reason for the failure is switching, and the Authenticator terminates the establishment process of the service flow.
  • the above method may also have the following feature: in the process of establishing a service flow, the handover completion message sent by the target base station that receives the handover of the terminal refers to: the AGW transmission channel establishment request After receiving the resource completion request, the Authenticator receives the handover complete message sent by the target base station.
  • the above method may also have the following features, and the handover completion message is a CMAC Key Count Update Proc process.
  • the invention also provides a service flow establishing system, comprising:
  • An access service network convergence gateway is configured to: when the service flow is established, when the service flow establishment failure is detected or the terminal handover is sensed, the establishment of the service flow is terminated, and the terminal is received before the preset time is exceeded. Re-initiating the establishment process of the service flow when the handover completion message sent by the target base station is switched;
  • the establishment process of the service flow is re-initiated.
  • the foregoing system may further have the following feature: the AGW is further configured to: when the service flow is a preliminary service flow, if the handover complete message sent by the target base station is not received before the preset time is exceeded, After the preset time, the establishment process of the service flow is re-initiated.
  • the system may also be configured as follows:
  • the AGW is configured to: notify the service flow establishment failure by: the AGW sends a channel establishment request to the base station, does not receive the channel establishment response, or receives a failed channel establishment response.
  • the AGW detects that the service flow establishment fails.
  • the AGW includes a channel management physical entity (DPF) and an authentication and authorization physical entity (Authenticator) located in different physical entities, where:
  • DPF channel management physical entity
  • Authenticator authentication and authorization physical entity
  • the Authenticator is configured to: send a resource reservation request message to the DPF, and further, after receiving the failed resource reservation response from the DPF, detecting that the service flow establishment fails, and terminating the establishment process of the service flow;
  • the DPF is configured to: send a channel establishment request to the base station, and also send a resource reservation response that fails to be sent to the Authenticator when the channel establishment response or the failed channel establishment response is not received.
  • the AGW includes DPFs and Authenticators located in different physical entities, where:
  • the DPF is set to: before the channel establishment request is sent, or after the channel establishment request is sent, the terminal is aware that the terminal is in the handover, and the resource reservation response that fails to be sent by the DPF to the Authenticator is lost.
  • the reason for the defeat is switching;
  • the Authenticator is configured to: after receiving the failed resource reservation response, the failure is caused by a handover, and the establishment process of the service flow is terminated.
  • the method of the present invention increases the timer and increases the value of the user in the Fail Indication field through the existing process, and can effectively implement the process of the user switching during the establishment of the channel, ensuring the user's access success rate and PSF flow. Established success rate.
  • Figure 1 is a schematic diagram of an architecture of an existing WiMAX system
  • FIG. 2 is a schematic diagram of an existing ASN decomposition
  • FIG 3 shows the flow of channel establishment in the access process provided by the existing solution (Authenticator and DPF are on different physical entities);
  • FIG 4 shows the flow of channel establishment in the access process provided by the existing solution (Authenticator and DPF are on the same physical entity);
  • FIG. 5 is a flowchart of a handover process when an ISF stream is established according to the present invention (the Authenticator and the DPF are on different physical entities);
  • FIG. 6 is a flowchart of a handover process when an ISF stream is established according to the present invention (the Authenticator and the DPF are on the same physical entity);
  • FIG. 7 is a flowchart of a handover process when a PSF flow is established according to the present invention.
  • Authenticator and DPF are on different physical entities, and the DPF senses that the user is switching when receiving a resource reservation request);
  • FIG. 8 is a flowchart of a handover process when a PSF flow is established according to the present invention.
  • Authenticator and DPF are on different physical entities, and the DPF detects that the user is switching after sending a channel establishment request);
  • FIG. 9 is a flowchart of a handover process when a PSF stream is established according to the present invention (the Authenticator and the DPF are on the same physical entity, and the AGW perceives that the user is switching before sending a channel establishment request);
  • FIG. 10 is a flowchart for establishing a PSF according to the present invention. The process of switching occurs (the Authenticator and the DPF are on the same physical entity, and the AGW senses that the user is switching after sending the channel establishment request);
  • FIG. 11 is a flowchart of a handover process when a PSF flow is established according to the present invention. The Authenticator and the DPF are aware that the user is switching after the channel establishment request is sent by the DPF on different physical entities.
  • FIG. 9 is a flowchart of a handover process when a PSF stream is established according to the present invention (the Authenticator and the DPF are on the same physical entity, and the AGW perceives that the user is switching before sending a channel establishment request);
  • FIG. 12 is a flowchart for establishing a PSF according to the present invention. The process of switching occurs when the Authenticator and the DPF are on different physical entities. When the DPF receives the resource reservation request, the user is aware of the handover.
  • Figure 13 is the flow of the handover when the PSF flow is established (Authenticator and
  • FIG. 14 is a flowchart of the handover when the PSF flow is established according to the present invention (the Authenticator and the DPF are on the same physical entity, AGW). The user is aware of the handover before the channel establishment request is sent.
  • FIG. 15 is a flowchart of the handover process in the process of establishing a service flow according to the present invention. The Authenticator and the DPF receive the CMAC Key in the process of establishing the service flow on different physical entities. Count Update Proc process);
  • FIG. 16 is a flowchart of a handover process in the process of establishing a service flow according to the present invention (the Authenticator and the DPF receive the CMAC Key Count Update Proc process in the process of establishing a service flow on the same physical entity).
  • the Authenticator and the DPF receive the CMAC Key Count Update Proc process in the process of establishing a service flow on the same physical entity.
  • the present invention provides a service flow establishing method, including:
  • the access service network aggregation gateway (AGW) establishes a service flow
  • AGW access service network aggregation gateway
  • the AGW perceives that the service flow establishment fails or senses the terminal handover
  • the AGW terminates the establishment process of the service flow, and receives the terminal handover before exceeding the preset time.
  • the AGW re-initiates the establishment process of the service flow;
  • the AGW re-initiates the establishment process of the service flow when receiving the handover complete message sent by the target base station of the terminal handover in the process of establishing the service flow.
  • the service flow is an initial service flow or a preliminary service flow.
  • the method further includes: exceeding a preset time
  • the foregoing AGW does not receive the handover complete message sent by the target base station, after the preset time is exceeded, the AGW re-initiates the establishment process of the service flow.
  • the service flow is an initial service flow, and the AGW terminates the establishment process of the service flow when the service flow fails to be established; the service flow is a preliminary service flow, and the AGW terminates the service when it detects the terminal handover.
  • the process of establishing the flow is an initial service flow, and the AGW terminates the establishment process of the service flow when the service flow fails to be established; the service flow is a preliminary service flow, and the AGW terminates the service when it detects the terminal handover.
  • the AGW senses that the service flow establishment fails by:
  • the AGW sends a channel establishment request to the base station, and the base station sends a channel establishment request to the terminal.
  • the AGW does not receive the channel setup response or receives the failed channel setup response, the AGW detects that the service flow establishment fails.
  • the AGW senses that the service flow establishment fails in the following manner:
  • the Authenticator sends a resource reservation request message to the DPF, and the DPF sends a channel establishment request to the base station;
  • the DPF When the DPF does not receive the channel setup response or the failed channel setup response, the DPF sends a failed resource reservation response to the Authenticator;
  • the Authenticator After the Authenticator receives the failed resource reservation response, the Authenticator detects that the service flow establishment fails.
  • the AGW terminates the establishment of the service flow, including:
  • the terminal Before the DPF sends a channel establishment request, or after the channel establishment request is sent, the terminal is aware that the terminal is in the handover, and the DPF fails to send the resource reservation response to the Authenticator, and the failure reason is handover;
  • the Authenticator After receiving the failed resource reservation response, the Authenticator learns that the reason for the failure is a handover, and the Authenticator terminates the establishment process of the service flow.
  • the handover completion message sent by the target base station that receives the handover of the terminal is: after the AGW sends the channel establishment request to the base station, the handover completion message sent by the target base station is received; or After the Authenticator sends a resource reservation request, it receives the target.
  • the handover complete message sent by the base station is: after the AGW sends the channel establishment request to the base station, the handover completion message sent by the target base station is received; or After the Authenticator sends a resource reservation request, it receives the target.
  • the handover complete message sent by the base station is: after the AGW sends the channel establishment request to the base station, the handover completion message sent by the target base station is received; or After the Authenticator sends a resource reservation request, it receives the target.
  • the handover complete message sent by the base station is: after the AGW sends the channel establishment request to the base station, the handover completion message sent by the target base station is received; or After the Authenticator sends a resource reservation request,
  • the handover completion message is a CMAC Key Count Update Proc process.
  • the preset time can be implemented by setting a timer or by other methods.
  • the present invention is not limited.
  • the technical solution implemented by the timer is given below.
  • the timer duration is determined as needed, preferably 2 seconds;
  • the Authenticator After receiving the resource reservation response, the Authenticator sets the timer TCMAC__Key_Count_Update if the result of the response is a failure, waiting for the CMAC Key Count Update Proc;
  • the DPF After the DPF sends the channel establishment request, if the DPF returns the resource reservation response to the Authenticator when the user is in the handover, the resource reserves the corresponding Fail Indication of the user to be switched; or, when the DPF receives The resource request message, if the user is in the handover, the DPF directly returns the failed resource reservation response message to the Authenticator, and the message carries the Fail Indication that identifies the user in the handover;
  • the Key Count Update Proc process receives the CMAC Key Count Update Proc process, and the Authenticator continues to initiate the process of establishing the currently established PSF stream.
  • the AGW After receiving the channel setup response, the AGW sets the timer TCMAC _Key_Count_Update if the result of the response is a failure, waiting for the CMAC Key Count Update Proc;
  • the AGW After receiving the CMAC Key Count Update Proc before the timer TCMAC_ _Key_Count_Update expires or during the establishment of the ISF flow, the AGW re-initiates the establishment process of the ISF flow.
  • the AGW sets the timer TCMAC Key_Count_Update and terminates the establishment of the PSF stream; or, when the AGW sends the channel establishment After the request, if the user is perceived to be switching, the AGW sets the timer.
  • the Authenticator After the Authenticator sends the resource reservation request, it receives the CMAC Key Count Update Proc process sent by the TargetBS. The Authenticator stops the establishment process of the service flow, assists the TargetBS to complete the CMAC Key Count Update Proc process, and continues to initiate the establishment of this failure. The flow of business flow. 4. Technical solution for switching when the DPF and the Authenticator establish a service flow on the same physical entity.
  • the AGW After the AGW sends the channel establishment request, it receives the CMAC Key Count Update Proc process, and the AGW stops the current service flow establishment process, assists the TargetBS to complete the CMAC Key Count Update Proc process, and continues to initiate the establishment of the failed service flow. Process.
  • the invention also provides a service flow establishing system, comprising:
  • the access service network convergence gateway is configured to terminate the establishment process of the service flow when the service flow is established or the terminal is switched, and the terminal is switched before the preset time is exceeded.
  • AGW access service network convergence gateway
  • the establishment process of the service flow is re-initiated.
  • the AGW is further configured to: when the service flow is a preliminary service flow, does not receive the handover complete message sent by the target base station before the preset time exceeds the preset time, and restarts after the preset time is exceeded. The process of establishing the service flow.
  • the AGW is configured to notify the service flow establishment failure by: the AGW sends a channel establishment request to the base station, and when the channel establishment response is not received or the failed channel establishment response is received, the AGW senses the service flow. The establishment failed.
  • the AGW includes a channel management physical entity (DPF) and an authentication 4 authorized physical entity (Authenticator) located in different physical entities:
  • DPF channel management physical entity
  • Authenticator authorized physical entity
  • the Authenticator is configured to send a resource reservation request message to the DPF, and is further configured to: after receiving the failed resource reservation response from the DPF, detecting that the service flow establishment fails, and terminating the establishment process of the service flow;
  • the DPF is configured to send a channel establishment request to the base station, and is used to send a failed resource reservation response to the Authenticator when the channel setup response or the failed channel setup response is not received.
  • the AGW includes DPFs and Authenticators located in different physical entities:
  • the DPF is configured to send a channel establishment request, or after the channel establishment request is sent, the terminal is aware that the terminal is in a handover, and the DPF fails to send a resource reservation response to the Authenticator, and the failure reason is a handover;
  • the Authenticator is configured to: after receiving the failed resource reservation response, learn that the reason for the failure is handover, and terminate the establishment process of the service flow.
  • Target BS is the target BS of the handover.
  • the process of switching when the ISF flow is established is provided by the present invention (the Authenticator and the DPF are on different physical entities), and the specific implementation steps are as follows:
  • Step 501 is the same as 301 ;
  • Step 502 is the same as 302;
  • Step 503 is the same as 303;
  • Step 504 When the DPF fails to receive the channel setup response or receives the failed channel setup response, the DPF sends a failed resource reservation response to the Authenticator. After receiving the failed resource reservation response, the Authenticator detects that the ISF flow fails to be established, sets the timer TCMAC Key_Count_Update, and waits for the CMAC Key Count Update Proc;
  • Step 505 TargetBS initiates CMAC Key Count Update Proc to Authenticator
  • the Authenticator stops the timer TCMAC Key_Count_Update , assists the TargetBS to complete the CMAC Key Count Update Proc process, and initiates the ISF flow establishment process;
  • Step 506 the same as 301;
  • Step 507 The DPF constructs a channel establishment request to the Target BS according to the resource reservation request message, and requests the establishment of the channel and the resource reservation.
  • Step 508 the TargetBS sends a channel establishment request to the MS
  • Step 509 After receiving the channel establishment request, the MS sends a channel establishment response to the TargetBS.
  • Step 511 the same as 306;
  • Step 512 the DPF sends a channel establishment confirmation to the TargetBS
  • Step 513 the same as 308.
  • Step 601 is the same as 401 ;
  • Step 602 The AGW receives the failed setup channel response, and the AGW senses that the ISF flow setup fails, sets the timer TCMAC__Key_Count_Update, and waits for the CMAC Key Count Update Proc.
  • Step 603 the TargetBS initiates the CMAC Key Count Update Proc, and the Authenticator stops the timer.
  • TCMAC—Key_Count_Update assists TargetBS to complete the CMAC Key Count Update Proc process, and initiates the establishment process of the ISF stream;
  • Step 604 the AGW sends a channel establishment request to the TargetBS, requesting channel establishment and resource reservation;
  • Step 605 The TargetBS sends a channel establishment request to the MS.
  • Step 606 After receiving the channel establishment request, the MS sends a channel establishment response to the TargetBS.
  • Step 607 The TargetBS sends a channel establishment response to the AGW.
  • Step 608 after receiving the successful channel establishment response, the AGW sends a channel establishment confirmation to
  • Step 701 is the same as 301;
  • step 702 the DPF receives the resource reservation request, and the user is aware that the resource reservation response sent by the user fails to be sent to the Authenticator, and the failure reason carried in the message is handover;
  • Step 703 The Authenticator receives the failed resource reservation response due to the handover, stops the currently established service flow, sets a timer TCMAC Key_Count_Update, waits for the CMAC Key Count Update Proc, and does not receive the CMAC Key Count before the timer expires. In the Update Proc process, after the timer expires, the Authenticator continues to initiate the establishment of the failed PSF stream, and sends a resource reservation request to the DPF.
  • Steps 704 - 710 the same steps 507 - 513.
  • the process of establishing a failover of a PSF flow is provided.
  • the Authenticator and the DPF are on different physical entities, and the DPF sends a channel establishment request to sense that the user is switching.
  • the specific implementation steps are as follows:
  • Step 801 is the same as 301 ;
  • Step 802 is the same as 302;
  • Step 803 The DPF senses that the user is in the handover, and sends a resource reservation response to the Authenticator, and the failure causes the user to switch;
  • Step 804 The Authenticator receives the failed resource reservation response due to the handover, stops the currently established service flow, and sets a timer TcMAc_K ey _c. un t_updat e, wait CMAC Key Count Update Proc, did not receive CMAC Key Count Update Proc process before the timer expires, the timer expires, Authenticator continue to initiate the establishment of this stream of PSF failed to send resource reservation request to the DPF;
  • Steps 805 - 811 the same steps 507 - 513.
  • a flow of establishing a handover failure of a PSF stream (Authenticator) provided by the present invention is provided.
  • the AGW senses that the user is switching before sending the channel establishment request.
  • the specific implementation steps are as follows:
  • Step 901 When establishing the PSF stream, the AGW senses that the user is switching, stops the currently established service flow, and sets a timer TCMAC Key_Count_Update to wait for the CMAC Key Count Update Proc, and does not receive the CMAC Key Count Update before the timer expires. Proc process, after the timer expires, the AGW continues to initiate the establishment of the failed PSF flow, and sends a channel establishment request to the TargetBS;
  • the process of establishing a PSF flow failure handover is provided in the present invention.
  • the Authenticator and the DPF are on the same physical entity, and the AGW is aware that the user is switching after the channel establishment request is sent.
  • the specific implementation steps are as follows:
  • Step 1001 is the same as 401 ;
  • step 1002 the AGW senses that the user is switching, stops the currently established service flow, and sets a timer TcMAc_K ey _c. Un t_u P date , waiting for CMAC Key Count Update Proc, the CMAC Key Count Update Proc process is not received before the timer expires. After the timer expires, the AGW continues the establishment of the failed PSF flow, and sends a channel establishment request to the TargetBS;
  • the process of establishing a failover of a PSF flow is provided in the present invention.
  • the Authenticator and the DPF are in different physical entities, and the DPF sends a channel establishment request to notify the user that the switch is performed.
  • the specific implementation steps are as follows:
  • Step 1101 the same as 301 ;
  • Step 1102 the same as 302;
  • Step 1103 The DPF senses that the user is in the handover, and the DPF fails to send the resource reservation response to the Authenticator, the reason for the failure is user switching;
  • Step 1104 The Authenticator receives the failed resource reservation response due to the handover, stops the currently established service flow, and sets a timer TcMAc_K ey _c. Un t_updat e , waiting for CMAC Key Count Update Proc, the Authenticator receives the CMAC Key Count Update Proc process before the timer expires, assisting TargetBS to complete the process;
  • step 1105 the Authenticator continues to initiate the PSF flow that failed to be established this time, as in 301; Step 1106 - Step 1112, and steps 507-513.
  • the flow of establishing a PSF flow failure handover is provided by the present invention.
  • Step 1201 is the same as 301;
  • Step 1202 The DPF receives the resource reservation request, and the resource response response sent by the user to the Authenticator is sent to the Authenticator.
  • Step 1203 After receiving the failed resource reservation response due to the handover, the Authenticator stops the currently established service flow, and sets a timer TcMAc_K ey _c. Unt_upd a t e , waiting for CMAC Key Count Update Proc, the Authenticator receives the CMAC Key Count Update Proc process before the timer expires, assisting TargetBS to complete the process;
  • Step 1204 the Authenticator continues to initiate the PSF flow that failed to be established this time, the same as 301; Steps 1205-1211, the same steps 507-513.
  • the process of establishing a failover of a PSF flow is provided in the present invention.
  • the Authenticator and the DPF are on the same physical entity, and the AGW is aware that the user is switching after the channel establishment request is sent.
  • the specific implementation steps are as follows:
  • Step 1301 is the same as 401;
  • Step 1302 the AGW senses that the user is in the handover, stops the currently established service flow, and sets the timer TCMAC__Key_Count_Update, waits for the CMAC Key Count Update Proc, and the AGW receives the CMAC Key Count Update Proc process before the timer expires, assisting the TargetBS to complete the process;
  • Step 1303 the AGW continues to initiate the establishment of the failed PSF flow, and sends a channel establishment request to the TargetBS;
  • the process of establishing a PSF flow failure handover is provided in the present invention.
  • the Authenticator and the DPF are on the same physical entity, and the AGW is aware that the user is switching before sending the channel establishment request.
  • the specific implementation steps are as follows:
  • Step 1401 When establishing the PSF flow, the AGW senses that the user is switching, stops the currently established service flow, sets a timer TCMAC—Key_Count_Update, and waits for CMAC Key Count Update.
  • AGW receives the CMAC Key Count Update Proc process to assist TargetBS in completing the process;
  • Step 1402 The AGW continues to initiate the PSF flow that fails to be established, and sends a channel establishment request to the TargetBS.
  • FIG. 15 is a flow chart of a handover process in the process of establishing a service flow (ISF flow or PSF flow) provided by the present invention (the Authenticator and the DPF receive the CMAC Key Count Update Proc process in the process of establishing a service flow on different physical entities)
  • the specific implementation steps are as follows:
  • Step 1501 is the same as 301 ;
  • Step 1503 the Authenticator receives the CMAC Key Count Update Proc process, stops the process of establishing the service flow, and assists the TargetBS to complete the process; In step 1504, the Authenticator continues to initiate the establishment process of the flow that failed to be established, as in 301; steps 1505-1511, and steps 507-513.
  • FIG. 16 is a flow of a handover process in a process of establishing a service flow (ISF flow or PSF flow) provided by the present invention (the Authenticator and the DPF receive the CMAC Key Count Update Proc process in the process of establishing a service flow on the same physical entity)
  • ISF flow or PSF flow the Authenticator and the DPF receive the CMAC Key Count Update Proc process in the process of establishing a service flow on the same physical entity
  • Step 1601 the same as 401;
  • Step 1602 the AGW receives the CMAC Key Count Update Proc process, stops the process of establishing the service flow, and assists the TargetBS to complete the process;
  • Step 1603 The AGW continues to initiate the establishment process of the service flow that fails to be established, and sends a channel establishment request to the TargetBS.
  • Steps 1604 - 1607 are the same as steps 605 - 608.
  • the solution proposed by the present invention fully utilizes the flow of the existing solution, increases the value of one timer and one field, and implements user switching in the user access process, which not only improves The success rate of the user's access is increased, and the success rate of the establishment of the PSF stream is increased, which ensures the smooth running of a specific service and improves the quality of the user's Internet access.
  • the present invention increases the timer and increases the value of the handover in the Fail Indication field through the existing process, and can effectively implement the process of the user switching during the establishment of the channel, ensuring the user's access success rate and PSF flow establishment. Success rate.

Abstract

本发明公开了一种业务流建立方法和系统，所述方法包括：AGW建立业务流时，AGW感知到业务流建立失败或感知到终端切换时，所述AGW终止所述业务流的建立过程，在超出预设时间前收到终端切换的目标基站发送的切换完成消息时，所述AGW重新发起所述业务流的建立过程；或者，AGW在建立业务流过程中，收到终端切换的目标基站发送的切换完成消息时，所述AGW重新发起所述业务流的建立过程。本发明能够有效的实现用户在建立通道过程中发生切换的流程，保证了用户的接入成功率及PSF流建立的成功率。

Description

一种业务流建立方法和系统
技术领域
本发明涉及通信领域，更具体地涉及一种微波接入全球互操作（ WiMAX ) 系统中业务流建立方法和系统。 背景技术
随着移动终端需求发展和无线技术的广泛应用， 微波接入全球互操作 (Worldwide Interoperability for Microwave Access, WiMAX)技术的发展越来越 迅猛， 前景越来越广阔。
请参阅附图 1和附图 2 , 简单介绍一下 WiMA 的网絡架构体系：
WiMAX (全球微波接入互操作性， 基于 IEEE802.16标准的无线城域网 技术。 World Interoperability for Microwave Access, 简称 WiMAX ) 的网络参 考模型如图 1。 其中的 CSN(Connectivity Service Network, 简称 CSN)是连接 服务网， MS/SS(Mobile Station/Subscriber Station简称 MS/SS)是移动终端， ASN ( Access Service Network, 接入服务网絡， 简称 ASN )是 WiMAX网络 系统中与接入业务相关的物理实体的对应消息流程的集合。 ASN之间的连接 通过 R4口。在 ASN内部又可以细化，如图 2所示，其中 AGW( ASN Gateway, ASN汇聚网关， 也可简称为 ASN-GW ) 和 BS ( Base Station, 基站）通过内 部接口 R6口连接， R6口由一系列的控制和承载平面协议构成。 更进一步细 分， ASN-GW又包括认证授权物理实体（Authenticator ), 通道管理物理实体 ( DPF )位置管理物理实体（PC/LR ), 这三个物理实体可以在同一个物理实 体内， 也可以在不同的物理实体上。
BS主要提供无线资源管理、 功率测量与控制、 空口数据的压缩和加密等 功能； ASN-GW中 Authenticator主要提供认证， 授权和计费的功能， DPF主 要提供通道管理， 协助高层与 MS之间建立 3层连接等功能， PC LR主要提 供位置管理， 寻呼等功能； CSN主要包括归属代理 （Home Agent, HA)、 动 态主机配置协议 ( Dynamic Host Configuration Protocol, DHCP )服务器， 及 认证 /授权 /计费 ( Authentication - Authorization - Accounting, AAA )服务器等 物理实体， 主要提供计费， 鉴权， 授权， 分配 IP地址、 internet业务接入等功 fl
用户在接入过程中， BS和 AGW之间会建立业务流（也可以称为数据通 道或通道）， 业务流有两种： ISF ( Initial Service Flow, 初始业务流） 和 PSF ( Prepare Service Flow,预备业务流）。用户在接入过程中，首先建立的是 ISF 流， 然后建立 PSF流。
三层的信令（如 DHCP信令 ) 必须在 ISF流中传输。 如果用户的 ISF流 建立失败， 用户的接入就失败。 特定的业务（如语音） 可以走 PSF流。 用户 建立多条业务流就可以使不同的业务走不同的 PSF流（如视频、 语音等）， 保 证每种业务的顺利的进行。
下面结合该架构体系对目前协议中现有的切换的流程进行针对性介绍。 现有的协议中所有的切换场景都是基于用户的业务流建立完成的基础上 进行的， 而在实际的环境中用户会在建立业务流的过程中发生切换。 下面结 合该架构体系对目前协议中现有的业务流的建立流程发生切换出现的问题进 行说明。
图 3为现有协议中的 DPF和 Authenticator在不同的物理实体上业务流的 建立流程。
301 : Authenticator根据授权的业务流的信息向 DPF发送资源预留请求消 息， 请求资源预留；
302: DPF根据资源预留请求消息， 构造通道建立请求给 BS, 请求通道 的建立和资源预留；
303: BS向 MS发送通道建立请求；
304: MS收到通道建立请求后， 向 BS发送通道建立响应；
305: BS发送通道建立响应给 DPF;
306: DPF接收到成功的通道建立响应后， 发送成功的资源预留响应给 Authenticator;
307: DPF发送通道建立确认给 BS; 308: Authenticator在收到资源预留响应后发送资源预留确认给 DPF。
图 4为现有协议中的 DPF和 Authenticator在同一物理实体上业务流的建 立流程。
401 : AGW发送通道建立请求给 BS, 请求通道的建立和资源预留；
402: BS向 MS发送通道建立请求；
403: MS收到通道建立请求后， 向 BS发送通道建立响应；
404: BS发送通道建立响应给 AGW;
405: AGW接收到成功的通道建立响应后， 发送通道建立确认给 BS。
在图 3所示场景中， DPF和 Authenticator在不同的物理实体上时： 在建立 ISF流过程中， 如果在 MS收到 BS的通道建立请求前发生切换， MS无法发送通道建立响应给 BS,此时 DPF就会收不到或者收到失败的通道 建立响应， DPF就会给 Authenticator发送失败的资源预留响应， Authenticator 此时会认为用户接入失败， 释放用户的所有资源， 而此时用户并不是接入失 败而是发生了切换。
在建立 PSF流的过程中， 如果 DPF在收到 Authenticator的资源预留请求 消息前 MS发生切换或者 BS收到通道建立请求前 MS发生切换， 此时 BS或 者 DPF都在处理切换流程， 无法处理建立业务流的请求， 此时 BS或者 DPF 都会发送失败的响应给 DPF或者 Authenticator, 导致 PSF流建立失败。 如果 此时还有 PSF流没有建立， 在建立后续的 PSF流的过程中， 如果切换没有结 束， PSF流都会建立失败。
在图 4所示场景中， DPF和 Authenticator在相同的物理实体上时： 在建立 ISF流过程中， 如果在 MS收到 BS的通道建立请求前发生切换， MS无法发送通道建立响应消息给 BS, 此时 AGW就会收不到或者收到失败 的 404通道建立响应， AGW此时会认为用户接入失败，释放用户的所有资源， 而此时用户并不是接入失败而是发生了切换； 在建立 PSF流的过程中， AGW在发送 401通道建立请求前或者 BS收到 401通道建立请求前 MS发生切换， 此时 BS或者 AGW都在处理切换流程， 无法处理建立业务流的请求， 导致 PSF流建立失败。 如果此时还有 PSF流没 有建立， 在建立后续的 PSF流的过程中， 如果切换没有结束， PSF流都会建 立失败。
上述存在的两个问题会导致如下问题：
1. 建立 ISF 流的过程中发生切换按协议流程处理导致接入失败， 导致 AGW释放用户，用户只有重新接入才能够连接到网络上，影响用户的接入成 功率和用户感受。
2. 建立 PSF流的过程中发生切换， 会导致当前建立的 PSF流建立失败， 使得基于该 PSF流的特定的业务 QoS (服务质量）无法得到保证， 影响用户 的上网质量。 发明内容
本发明要解决的技术问题是提供一种 WIMA 业务流建立方法和系统， 提高用户满意度。
为了解决上述问题， 本发明提供了一种业务流建立方法， 包括： 接入服务网络汇聚网关 （AGW ) 建立业务流时， AGW感知到业务流建 立失败或感知到终端切换时， 所述 AGW终止所述业务流的建立过程， 在超 出预设时间前收到终端切换的目标基站发送的切换完成消息时， 所述 AGW 重新发起所述业务流的建立过程；
或者， AGW在建立业务流过程中， 收到终端切换的目标基站发送的切换 完成消息时， 所述 AGW重新发起所述业务流的建立过程。
上述方法还可具有以下特点，所述业务流为初始业务流或者预备业务流。 上述方法还可具有以下特点， 所述业务流为预备业务流时， 所述方法还 包括， 若在超出预设时间前所述 AGW未收到所述目标基站发送的切换完成 消息， 在超出所述预设时间后， 所述 AGW重新发起所述业务流的建立过程。 上述方法还可具有以下特点， 所述业务流为初始业务流时， 所述 AGW 感知到业务流建立失败时， 所述 AGW终止所述业务流的建立过程； 所述业 务流为预备业务流时， 所述 AGW感知到终端切换时， 所述 AGW终止所述 业务流的建立过程。
上述方法还可具有以下特点， 所述 AGW通过如下方式感知到业务流建 立失败：
所述 AGW发送通道建立请求至基站， 所述基站发送通道建立请求至终 端； 所述 AGW未收到通道建立响应或者收到失败的通道建立响应时， 所述 AGW感知到业务流建立失败。
上述方法还可具有以下特点， 所述业务流为初始业务流， 所述 AGW中 包括位于不同物理实体的通道管理物理实体 （DPF ) 和认证授权物理实体 ( Authenticator ) , 所述 AGW通过如下方式感知到业务流建立失败：
所述 Authenticator发送资源预留请求消息至 DPF, 所述 DPF发送通道建 立请求至基站；
所述 DPF 未收到通道建立响应或者失败的通道建立响应时， 所述 DPF 发送失败的资源预留响应给 Authenticator;
所述 Authenticator收到失败的资源预留响应后， 所述 Authenticator感知 到业务流建立失败。
上述方法还可具有以下特点，所述 AGW中包括位于不同物理实体的 DPF 和 Authenticator, 所述 AGW感知到终端切换时， 所述 AGW终止所述业务流 的建立过程， 包括：
所述 DPF发送通道建立请求前， 或者， 发送通道建立请求后， 感知到终 端在切换， 所述 DPF发送失败的资源预留响应给 Authenticator, 失败原因为 切换；
所述 Authenticator收到所述失败的资源预留响应后 , 获知失败原因为切 换， 所述 Authenticator终止所述业务流的建立过程。
上述方法还可具有以下特点， 所述 AGW在建立业务流过程中， 收到终 端切换的目标基站发送的切换完成消息是指： 所述 AGW发送通道建立请求 至基站后， 收到目标基站发送的切换完成消息； 或者， Authenticator发送资源 预留请求后， 收到目标基站发送的切换完成消息。
上述方法还可具有以下特点， 所述切换完成消息为 CMAC Key Count Update Proc流程。
本发明还提供一种业务流建立系统， 包括：
接入服务网络汇聚网关（AGW ) , 其设置为： 建立业务流时， 感知到业 务流建立失败或感知到终端切换时， 终止所述业务流的建立过程， 在超出预 设时间前收到终端切换的目标基站发送的切换完成消息时， 重新发起所述业 务流的建立过程；
或者， 在建立业务流过程中， 收到终端切换的目标基站发送的切换完成 消息时， 重新发起所述业务流的建立过程。
上述系统还可具有以下特点， 所述 AGW还设置为： 在所述业务流为预 备业务流时，若在超出预设时间前未收到所述目标基站发送的切换完成消息， 在超出所述预设时间后， 重新发起所述业务流的建立过程。
上述系统还可具有以下特点， 所述 AGW是设置为： 通过如下方式感知 到业务流建立失败： 所述 AGW发送通道建立请求至基站， 未收到通道建立 响应或者收到失败的通道建立响应时， 所述 AGW感知到业务流建立失败。
上述系统还可具有以下特点， 所述 AGW中包括位于不同物理实体的通 道管理物理实体 ( DPF )和认证授权物理实体（Authenticator ), 其中：
所述 Authenticator设置为：发送资源预留请求消息至 DPF,还用于从 DPF 收到失败的资源预留响应后， 感知到业务流建立失败， 终止所述业务流的建 立过程；
所述 DPF设置为： 发送通道建立请求至基站， 还用于未收到通道建立响 应或者失败的通道建立响应时， 发送失败的资源预留响应给 Authenticator。
上述系统还可具有以下特点，所述 AGW中包括位于不同物理实体的 DPF 和 Authenticator, 其中：
所述 DPF设置为： 发送通道建立请求前， 或者， 发送通道建立请求后， 感知到终端在切换， 所述 DPF发送失败的资源预留响应给 Authenticator, 失 败原因为切换；
所述 Authenticator设置为： 收到所述失败的资源预留响应后， 获知失败 原因为切换， 终止所述业务流的建立过程。
本发明方法通过现有的流程增加定时器和增加 Fail Indication字段中标识 用户在切换的值， 能够有效的实现用户在建立通道过程中发生切换的流程， 保证了用户的接入成功率及 PSF流建立的成功率。 附图概述
图 1为现有 WiMAX系统的架构体系示意图;
图 2为现有 ASN分解示意图;
图 3为现有方案提供的接入过程中通道建立的流程 (Authenticator和 DPF 在不同的物理实体上)；
图 4为现有方案提供的接入过程中通道建立的流程 (Authenticator和 DPF 在相同的物理实体上)；
图 5为本发明提供的建立 ISF流时发生切换的流程 (Authenticator和 DPF 在不同的物理实体上)；
图 6为本发明提供的建立 ISF流时发生切换的流程 (Authenticator和 DPF 在相同的物理实体上)；
图 7 为本发明提供的建立 PSF流时发生切换的流程 (Authenticator和 DPF 在不同的物理实体上， DPF收到资源预留请求时感知到用户在切换)；
图 8 为本发明提供的建立 PSF流时发生切换的流程 (Authenticator和 DPF 在不同的物理实体上， DPF发送了通道建立请求后感知到用户在切换)；
图 9 为本发明提供的建立 PSF流时发生切换的流程 (Authenticator和 DPF 在相同的物理实体上， AGW在发送通道建立请求前感知到用户在切换)； 图 10 为本发明提供的建立 PSF 流时发生切换的流程 (Authenticator和 DPF在相同的物理实体上， AGW在发送通道建立请求后感知到用户在切换)； 图 11 为本发明提供的建立 PSF 流时发生切换的流程 (Authenticator和 DPF在不同的物理实体上， DPF发送了通道建立请求后感知到用户在切换)； 图 12 为本发明提供的建立 PSF 流时发生切换的流程 (Authenticator和 DPF在不同的物理实体上， DPF收到资源预留请求时感知到用户在切换)； 图 13 为本发明提供的建立 PSF 流时发生切换的流程 (Authenticator和
DPF在相同的物理实体上， AGW在发送通道建立请求后感知到用户在切换)； 图 14 为本发明提供的建立 PSF 流时发生切换的流程 (； Authenticator和 DPF在相同的物理实体上， AGW在发送通道建立请求前感知到用户在切换)； 图 15 为本发明提供的建立业务流过程中发生切换的流程 (Authenticator 和 DPF在不同的物理实体上， 在建立业务流过程中收到 CMAC Key Count Update Proc流程)；
图 16 为本发明提供的建立业务流过程中发生切换的流程 (Authenticator 和 DPF在相同的物理实体上， 在建立业务流过程中收到 CMAC Key Count Update Proc流程）。 本发明的较佳实施方式
下面结合附图和具体实施例对本发明的技术方案进行进一步的详细描 述， 以方便本领域的技术人员更好的理解本发明并予以实施， 但所举实施例 不作为对本发明的限定。
本发明提供一种业务流建立方法， 包括：
接入服务网络汇聚网关 （AGW ) 建立业务流时， AGW感知到业务流建 立失败或感知到终端切换时， 所述 AGW终止所述业务流的建立过程， 在超 出预设时间前收到终端切换的目标基站发送的切换完成消息时， 所述 AGW 重新发起所述业务流的建立过程；
或者， AGW在建立业务流过程中， 收到终端切换的目标基站发送的切换 完成消息时， 所述 AGW重新发起所述业务流的建立过程。
其中， 所述业务流为初始业务流或者预备业务流。
其中， 所述业务流为预备业务流时， 所述方法还包括， 在超出预设时间 前所述 AGW未收到所述目标基站发送的切换完成消息时， 在超出所述预设 时间后， 所述 AGW重新发起所述业务流的建立过程。
其中， 所述业务流为初始业务流， AGW感知到业务流建立失败时终止所 述业务流的建立过程； 所述业务流为预备业务流， 所述 AGW感知到终端切 换时， 终止所述业务流的建立过程。
其中 , DPF和 Authenticator在同一物理实体时， 所述 AGW通过如下方 式感知到业务流建立失败：
所述 AGW发送通道建立请求至基站， 所述基站发送通道建立请求至终 端； 所述 AGW未收到通道建立响应或者收到失败的通道建立响应时， 所述 AGW感知到业务流建立失败。
其中， DPF和 Authenticator位于不同物理实体时， 所述 AGW通过如下 方式感知到业务流建立失败：
所述 Authenticator发送资源预留请求消息至 DPF， 所述 DPF发送通道建 立请求至基站；
所述 DPF 未收到通道建立响应或者失败的通道建立响应时， 所述 DPF 发送失败的资源预留响应给 Authenticator;
所述 Authenticator收到失败的资源预留响应后， 所述 Authenticator感知 到业务流建立失败。
其中 , DPF和 Authenticator位于不同物理实体时， 所述 AGW感知到终 端切换时， 所述 AGW终止所述业务流的建立过程包括：
所述 DPF发送通道建立请求前， 或者， 发送通道建立请求后， 感知到终 端在切换， 所述 DPF发送失败的资源预留响应给 Authenticator, 失败原因为 切换；
所述 Authenticator收到所述失败的资源预留响应后， 获知失败原因为切 换， 所述 Authenticator终止所述业务流的建立过程。
其中， 所述 AGW在建立业务流过程中， 收到终端切换的目标基站发送 的切换完成消息是指： 所述 AGW发送通道建立请求至基站后， 收到目标基 站发送的切换完成消息； 或者， Authenticator发送资源预留请求后， 收到目标 基站发送的切换完成消息。
其中 , 所述切换完成消息为 CMAC密钥更新 （ CMAC Key Count Update Proc ) 流程。
其中， 是否超出预设时间可以通过设置定时器实现， 也可以通过其他方 式实现， 本发明不作限定， 下面给出通过定时器实现的技术方案。
一、 当 DPF和 Authenticator在不同的物理实体上的建立业务流失败发生 切换的技术方案：
增加一个定时器 TcMAC_Key_C。Unt_Update,定时器时长根据需要确定，优选为 2 秒；
A.当建立 ISF流时发生切换：
(1) Authenticator在收到资源预留响应后， 如果响应的结果为失败则设置 定时器 TCMAC— _Key_Count_Update， 等待 CMAC Key Count Update Proc;
(2)在定时器 TcMAC_Key_C。Unt_Update超时前或者在建立 ISF 流过程中收到 CMAC Key Count Update Proc后， Authenticator重新发起 ISF流的建立流程。
B.当建立 PSF流时发生切换：
在 Fail Indcation (失败指示） 字段中增加一个失败原因值（此原因值可 以在当前未使用的值选一个如： 54 = MS is HO Processing )用于标识用户在 切换；
(1)当 DPF发送了通道建立请求后， 如果感知到用户在切换时， DPF返回 资源预留响应给 Authenticator, 该资源预留相应携带的标识用户在切换的 Fail Indication; 或者， 当 DPF收到资源请求消息， 如果用户在切换， DPF直接回 失败的资源预留响应消息给 Authenticator, 消息中携带标识用户在切换的 Fail Indication;
(2)当 Authenticator收到 DPF的资源预留响应， 如果该资源预留响应中携 带标识用 户 在切换的 Fail Indication , Authenticator 设置定时器 TcMAC_Key_Count_Update , 终止 PSF流的建立， 当定时器超时， 或者超时前 CMAC
Key Count Update Proc流程， 或者在建立 PSF流的过程中收到 CMAC Key Count Update Proc流程， Authenticator继续发起当前建立的 PSF流的建立流程。
二、 当 DPF和 Authenticator在相同的物理实体上建立业务流失败发生切 换的技术方案
增加一个定时器 TCMAC Key_Count_Update , 时长推荐为 2秒；
Α.当建立 ISF时发生切换：
(1) AGW在收到通道建立响应后， 如果响应的结果为失败则设置定时器 TCMAC _Key_Count_Update， 等待 CMAC Key Count Update Proc;
(2) 在定时器 TCMAC_ _Key_Count_Update超时前或者在建立 ISF 流过程中收到 CMAC Key Count Update Proc后， AGW重新发起该 ISF流的建立流程。
B.当建立 PSF流时发生切换：
(1)当 AGW在建立 PSF流时，在发送通道建立请求前，如果感知到用户 在切换， AGW设置定时器 TCMAC Key— Count— Update并终止 PSF流的建立； 或者， 当 AGW发送了通道建立请求后， 如果感知到用户在切换， AGW设置定时器
TcMAC_Key_Count_Update并终止 PSF流的建立；
( 2 ) 当定时器 TcMAC_Key_C。unt_Update超时或者在超时前 AGW收到 CMAC Key Count Update Proc流程， AGW继续发起当前建立的 PSF流的建立流程。
三、 当 DPF和 Authenticator在不同的物理实体上的建立业务流过程中发 生切换的技术方案
A.当 Authenticator发送了资源预留请求后，收到了 TargetBS发送的 CMAC Key Count Update Proc 流程， Authenticator停止业务流的建立流程， 协助 TargetBS完成 CMAC Key Count Update Proc流程后， 继续发起建立本次失败 的业务流的流程。 四、 当 DPF和 Authenticator在相同的物理实体上的建立业务流过程中发 生切换的技术方案
A.当 AGW发送了通道建立请求后，收到了 CMAC Key Count Update Proc 流程， AGW停止当前业务流的建立流程，协助 TargetBS完成 CMAC Key Count Update Proc流程后， 继续发起建立本次失败的业务流的流程。
本发明还提供一种业务流建立系统， 包括：
接入服务网络汇聚网关（AGW ) , 用于建立业务流时， 感知到业务流建 立失败或感知到终端切换时， 终止所述业务流的建立过程， 在超出预设时间 前收到终端切换的目标基站发送的切换完成消息时， 重新发起所述业务流的 建立过程；
或者， 用于在建立业务流过程中， 收到终端切换的目标基站发送的切换 完成消息时， 重新发起所述业务流的建立过程。
其中， 所述 AGW， 还用于在所述业务流为预备业务流时， 在超出预设时 间前未收到所述目标基站发送的切换完成消息， 在超出所述预设时间后， 重 新发起所述业务流的建立过程。
其中， 所述 AGW用于通过如下方式感知到业务流建立失败： 所述 AGW 发送通道建立请求至基站， 未收到通道建立响应或者收到失败的通道建立响 应时， 所述 AGW感知到业务流建立失败。
其中， 所述 AGW中包括位于不同物理实体的通道管理物理实体（DPF ) 和认证 4受权物理实体 ( Authenticator ):
所述 Authenticator, 用于发送资源预留请求消息至 DPF, 还用于从 DPF 收到失败的资源预留响应后， 感知到业务流建立失败， 终止所述业务流的建 立过程；
所述 DPF, 用于发送通道建立请求至基站， 还用于未收到通道建立响应 或者失败的通道建立响应时， 发送失败的资源预留响应给 Authenticator。
其中 , 所述 AGW中包括位于不同物理实体的 DPF和 Authenticator: 所述 DPF, 用于发送通道建立请求前， 或者， 发送通道建立请求后， 感 知到终端在切换， 所述 DPF发送失败的资源预留响应给 Authenticator, 失败 原因为切换；
所述 Authenticator,用于收到所述失败的资源预留响应后，获知失败原因 为切换， 终止所述业务流的建立过程。
下面通过实施例和附图进一步详细说明本发明， 下面各实施例中， Target BS是切换的目标 BS。
实施例 1
参考图 5 本发明提供的建立 ISF 流时发生切换的流程 (Authenticator和 DPF在不同的物理实体上)， 具体实现步骤如下：
步骤 501 同 301 ;
步骤 502 同 302;
步骤 503 同 303;
步骤 504当 DPF收不到通道建立响应或者收到失败的通道建立响应， DPF 发送失败的资源预留响应给 Authenticator。 Authenticator收到失败的资源预留 响应后，感知到 ISF流建立失败，设置定时器 TCMAC Key_Count_Update ,等待 CMAC Key Count Update Proc;
步骤 505 TargetBS发起 CMAC Key Count Update Proc至 Authenticator,
Authenticator停止定时器 TCMAC Key_Count_Update , 协助 TargetBS完成 CMAC Key Count Update Proc流程， 并发起 ISF流的建立流程；
步骤 506, 同 301 ;
步骤 507, DPF根据资源预留请求消息， 构造通道建立请求给 TargetBS, 请求通道的建立和资源预留；
步骤 508, TargetBS向 MS发送通道建立请求； ；
步骤 509, MS收到通道建立请求后， 向 TargetBS发送通道建立响应； 步骤 510, TargetBS发送通道建立响应给 DPF;
步骤 511 , 同 306;
步骤 512, DPF发送通道建立确认给 TargetBS;
步骤 513， 同 308。
实施例 2
参考图 6对本发明为建立 ISF流时发生切换的流程 (Authenticator和 DPF 在相同的物理实体上)， 具体实现步骤如下：
步骤 601 同 401 ;
步骤 602 , AGW收到失败的建立通道响应 , AGW感知到 ISF流建立失 败， 设置定时器 TCMAC— _Key_Count_Update ·, 等待 CMAC Key Count Update Proc; 步骤 603， TargetBS发起 CMAC Key Count Update Proc , Authenticator停 止定时器 TCMAC— Key_Count_Update , 协助 TargetBS完成 CMAC Key Count Update Proc流程， 并发起 ISF流的建立流程；
步骤 604, AGW发送通道建立请求给 TargetBS, 请求通道的建立和资源 预留；
步骤 605, TargetBS向 MS发送通道建立请求；
步骤 606, MS收到通道建立请求后， 向 TargetBS发送通道建立响应； 步骤 607 , TargetBS发送通道建立响应给 AGW;
步骤 608 , AGW接收到成功的通道建立响应后， 发送通道建立确认给
TargetBS。
实施例 3
参考图 7 为本发明提供的建立 PSF流失败发生切换的流程 (Authenticator 和 DPF在不同的物理实体上， DPF收到 301资源预留请求时感知到用户在切 换)， 具体实现步骤如下： 步骤 701同 301 ;
步骤 702， DPF收到资源预留请求， 感知到用户在切换， 发送失败的资 源预留响应给 Authenticator, 消息中携带的失败原因为切换；
步骤 703， Authenticator收到因切换的失败的资源预留响应， 停止当前建 立的业务流 , 设置定时器 TCMAC Key—Count—Update , 等待 CMAC Key Count Update Proc, 定时器超时前没有收到 CMAC Key Count Update Proc流程， 定时器超 时后， Authenticator继续发起本次失败的 PSF流的建立， 发送资源预留请求 给 DPF;
步骤 704 - 710， 同步骤 507 - 513。
实施例 4
参考图 8 为本发明提供的建立 PSF流失败发生切换的流程 (Authenticator 和 DPF在不同的物理实体上， DPF发送通道建立请求后感知到用户在切换)， 具体实现步骤如下：
步骤 801同 301 ;
步骤 802同 302;
步骤 803， DPF 感知到用户在切换， 发送失败的资源预留响应给 Authenticator, 失败原因为用户切换；
步骤 804 , Authenticator收到因切换的失败的资源预留响应， 停止当前 建立的业务流，设置定时器 TcMAc_Key_c。unt_update ,等待 CMAC Key Count Update Proc, 定时器超时前没有收到 CMAC Key Count Update Proc流程， 定时器超 时后， Authenticator继续发起本次失败的 PSF流的建立， 发送资源预留请求 给 DPF;
步骤 805 - 811 , 同步骤 507 - 513。
实施例 5
参考图 9 为本发明提供的建立 PSF流失败发生切换的流程 (Authenticator 和 DPF在相同的物理实体上， AGW在发送通道建立请求前感知到用户在切 换)， 具体实现步骤如下：
步骤 901 , AGW在建立 PSF流的时候感知到用户在切换， 停止当前建 立的业务流， 设置定时器 TCMAC Key— Count— Update 等待 CMAC Key Count Update Proc, 定时器超时前没有收到 CMAC Key Count Update Proc流程， 定时器超 时后， AGW 继续发起本次失败的 PSF 流的建立， 发送通道建立请求给 TargetBS;
步骤 902 - 905 , 同步骤 605 - 608。
实施例 6
参考图 10 为本发明提供的建立 PSF 流失败发生切换的流程 (Authenticator和 DPF在相同的物理实体上， AGW在发送通道建立请求后感 知到用户在切换)， 具体实现步骤如下：
步骤 1001 同 401 ;
步骤 1002, AGW感知到用户在切换， 停止当前建立的业务流， 设置定 时器 TcMAc_Key_c。unt_uPdate , 等待 CMAC Key Count Update Proc, 定时器超时前 没有收到 CMAC Key Count Update Proc流程， 定时器超时后， AGW继续本 次失败的 PSF流的建立， 发送通道建立请求给 TargetBS;
步骤 1003 - 1006, 同步骤 605 - 608。
实施例 7
参考图 11 为本发明提供的建立 PSF 流失败发生切换的流程 (Authenticator和 DPF在不同的物理实体上， DPF发送了通道建立请求后感知 到用户在切换)， 具体实现步骤如下：
步骤 1101 , 同 301 ;
步骤 1102， 同 302;
步骤 1103 , DPF 感知到用户在切换， DPF发送失败的资源预留响应给 Authenticator, 失败原因为用户切换；
步骤 1104, Authenticator收到因切换的失败的资源预留响应， 停止当前 建立的业务流，设置定时器 TcMAc_Key_c。unt_update ,等待 CMAC Key Count Update Proc, 定时器超时前 Authenticator收到 CMAC Key Count Update Proc流程， 协助 TargetBS完成流程；
步骤 1105, Authenticator继续发起本次建立失败的 PSF流， 同 301 ; 步骤 1106 -步骤 1112, 同步骤 507 - 513。
实施例 8
参考图 12 为本发明提供的建立 PSF 流失败发生切换的流程
(Authenticator和 DPF在不同的物理实体上， DPF收到资源预留请求时感知到 用户在切换)， 具体实现步骤如下：
步骤 1201同 301 ;
步骤 1202, DPF收到资源预留请求， 感知到用户在切换， 发送失败的资 源预留响应给 Authenticator, 消息中携带的失败原因为切换；
步骤 1203 , Authenticator收到因切换的失败的资源预留响应后， 停止当 前建立的业务流， 设置定时器 TcMAc_Key_c。unt_update， 等待 CMAC Key Count Update Proc, 定时器超时前 Authenticator收到 CMAC Key Count Update Proc 流程， 协助 TargetBS完成流程；
步骤 1204, Authenticator继续发起本次建立失败的 PSF流， 同 301 ; 步骤 1205 - 1211， 同步骤 507 - 513。
实施例 9
参考图 13 为本发明提供的建立 PSF 流失败发生切换的流程 (Authenticator和 DPF在相同的物理实体上， AGW在发送通道建立请求后感 知到用户在切换)， 具体实现步骤如下：
步骤 1301 同 401 ; 步骤 1302, AGW感知到用户在切换， 停止当前建立的业务流并设置定 时器 TCMAC— _Key_Count_Update， 等待 CMAC Key Count Update Proc, 定时器超时前 AGW收到 CMAC Key Count Update Proc流程， 协助 TargetBS完成流程； 步骤 1303， AGW继续发起本次建立失败的 PSF流， 发送通道建立请求 给 TargetBS;
步骤 1304 - 1307, 同步骤 605 - 608。
实施例 10
参考图 14 为本发明提供的建立 PSF 流失败发生切换的流程 (Authenticator和 DPF在相同的物理实体上， AGW在发送通道建立请求前感 知到用户在切换)， 具体实现步骤如下：
步骤 1401， AGW在建立 PSF流的时候感知到用户在切换， 停止当前建 立的业务流， 设置定时器 TCMAC— Key_Count_Update , 等待 CMAC Key Count Update
Proc, 定时器超时前 AGW收到 CMAC Key Count Update Proc流程， 协助 TargetBS完成流程；
步骤 1402， AGW继续发起本次建立失败的 PSF流， 发送通道建立请求 给 TargetBS;
步骤 1403 - 1406， 同步骤 605 - 608。
实施例 11
参考图 15 为本发明提供的建立业务流（ISF流或 PSF流）过程中发生切 换的流程 (Authenticator和 DPF在不同的物理实体上， 在建立业务流过程中收 到 CMAC Key Count Update Proc流程)， 具体实现步骤如下：
步骤 1501 同 301 ;
步骤 1502 同 302;
步骤 1503 , Authenticator收到 CMAC Key Count Update Proc流程， 停止 本次建立业务流的流程， 并协助 TargetBS完成流程； 步骤 1504, Authenticator继续发起本次建立失败的流的建立过程，同 301 ; 步骤 1505 - 1511 , 同步骤 507 - 513。
实施例 12
参考图 16 为本发明提供的建立业务流（ISF流或 PSF流）过程中发生切 换的流程 (Authenticator和 DPF在相同的物理实体上， 在建立业务流过程中收 到 CMAC Key Count Update Proc流程)， 具体实现步骤如下：
步骤 1601， 同 401 ;
步骤 1602, AGW收到 CMAC Key Count Update Proc流程， 停止本次建 立业务流的流程， 并协助 TargetBS完成流程；
步骤 1603 , AGW继续发起本次建立失败的业务流的建立过程， 发送通 道建立请求给 TargetBS;
步骤 1604 - 1607, 同步骤 605 - 608。
通过上述实施例的描述， 可以看出本发明提出的方案充分利用了现有方 案的流程， 增加 1个定时器和一个字段的取值， 实现了用户接入过程中的用 户的切换， 不仅提高了用户的接入成功率， 而且增加了 PSF流建立的成功率， 保证了特定业务的顺利进行， 提高了用户上网的质量。
尽管为示例目的， 已经公开了本发明的优选实施例， 本领域的技术人员 将意识到各种改进、 增加和取代也是可能的， 因此， 本发明的范围应当不限 于上述实施例。
本领域普通技术人员可以理解上述方法中的全部或部分步骤可通过程序 来指令相关硬件完成， 所述程序可以存储于计算机可读存储介质中， 如只读 存储器、 磁盘或光盘等。 可选地， 上述实施例的全部或部分步骤也可以使用 一个或多个集成电路来实现。 相应地， 上述实施例中的各模块 /单元可以采用 硬件的形式实现， 也可以采用软件功能模块的形式实现。 本发明不限制于任 何特定形式的硬件和软件的结合。 工业实用性
本发明通过现有的流程增加定时器和增加 Fail Indication字段中标识用户 在切换的值， 能够有效的实现用户在建立通道过程中发生切换的流程， 保证 了用户的接入成功率及 PSF流建立的成功率。

Claims

权 利 要 求 书
1、 一种业务流建立方法， 其包括：
接入服务网络汇聚网关 （AGW ) 建立业务流时， AGW感知到业务流建 立失败或感知到终端切换时， 所述 AGW终止所述业务流的建立过程， 在超 出预设时间前收到终端切换的目标基站发送的切换完成消息时， 所述 AGW 重新发起所述业务流的建立过程；
或者， AGW在建立业务流过程中， 收到终端切换的目标基站发送的切换 完成消息时， 所述 AGW重新发起所述业务流的建立过程。
2、 如权利要求 1所述的方法， 其中， 所述业务流为初始业务流或者预 备业务流。
3、 如权利要求 1所述的方法， 其中， 所述业务流为预备业务流时， 所 述方法还包括： 若在超出预设时间前所述 AGW未收到所述目标基站发送的 切换完成消息， 在超出所述预设时间后， 所述 AGW重新发起所述业务流的 建立过程。
4、 如权利要求 1所述的方法， 其中， 所述业务流为初始业务流时， 所 述 AGW感知到业务流建立失败时， 所述 AGW终止所述业务流的建立过程； 所述业务流为预备业务流时， 所述 AGW感知到终端切换时， 所述 AGW终 止所述业务流的建立过程。
5、 如权利要求 1所述的方法， 其中， 所述 AGW通过如下方式感知到 业务流建立失败：
所述 AGW发送通道建立请求至基站， 所述基站发送通道建立请求至终 端； 所述 AGW未收到通道建立响应或者收到失败的通道建立响应时， 所述 AGW感知到业务流建立失败。
6、 如权利要求 1所述的方法， 其中， 所述业务流为初始业务流， 所述 AGW中包括位于不同物理实体的通道管理物理实体（ DPF )和认证授权物理 实体（ Authenticator ), 所述 AGW通过如下方式感知到业务流建立失败： 所述 Authenticator发送资源预留请求消息至 DPF， 所述 DPF发送通道建 立请求至基站； 所述 DPF 未收到通道建立响应或者失败的通道建立响应时， 所述 DPF 发送失败的资源预留响应给 Authenticator;
所述 Authenticator收到失败的资源预留响应后， 所述 Authenticator感知 到业务流建立失败。
7、 如权利要求 1所述的方法， 其中， 所述 AGW中包括位于不同物理 实体的 DPF和 Authenticator,所述 AGW感知到终端切换时，所述 AGW终止 所述业务流的建立过程包括：
所述 DPF发送通道建立请求前， 或者， 发送通道建立请求后， 感知到终 端在切换， 所述 DPF发送失败的资源预留响应给 Authenticator, 失败原因为 切换；
所述 Authenticator收到所述失败的资源预留响应后， 获知失败原因为切 换， 所述 Authenticator终止所述业务流的建立过程。
8、 如权利要求 1所述的方法，其中，所述 AGW在建立业务流过程中， 收到终端切换的目标基站发送的切换完成消息是指： 所述 AGW发送通道建 立倚求至基站后， 收到目标基站发送的切换完成消息； 或者， Authenticator 发送资源预留请求后， 收到目标基站发送的切换完成消息。
9、 如权利要求 1所述的方法，其中， 所述切换完成消息为 CMAC Key Count Update Proc流程。
10、 一种业务流建立系统， 其包括：
接入服务网络汇聚网关（AGW ) , 其设置为： 建立业务流时， 感知到业 务流建立失败或感知到终端切换时， 终止所述业务流的建立过程， 在超出预 设时间前收到终端切换的目标基站发送的切换完成消息时， 重新发起所述业 务流的建立过程；
或者， 在建立业务流过程中， 收到终端切换的目标基站发送的切换完成 消息时， 重新发起所述业务流的建立过程。
11、 如权利要求 10所述的系统， 其中， 所述 AGW还设置为： 在所述 业务流为预备业务流时， 若在超出预设时间前未收到所述目标基站发送的切 换完成消息， 在超出所述预设时间后， 重新发起所述业务流的建立过程。
12、 如权利要求 10所述的系统， 其中，
所述 AGW是设置为通过如下方式感知到业务流建立失败：所述 AGW发 送通道建立请求至基站， 未收到通道建立响应或者收到失败的通道建立响应 时， 所述 AGW感知到业务流建立失败。
13、 如权利要求 10所述的系统， 其中， 所述 AGW中包括位于不同物 理实体的通道管理物理实体（DPF )和认证授权物理实体（ Authenticator ), 所述 Authenticator设置为： 发送资源预留请求消息至 DPF; 以及从 DPF 收到失败的资源预留响应后， 感知到业务流建立失败， 终止所述业务流的建 立过程；
所述 DPF设置为： 发送通道建立请求至基站； 以及未收到通道建立响应 或者失败的通道建立响应时， 发送失败的资源预留响应给 Authenticator。
14、 如权利要求 10所述的系统， 其中， 所述 AGW中包括位于不同物 理实体的 DPF和 Authenticator,
所述 DPF设置为： 发送通道建立请求前， 或者， 发送通道建立请求后， 感知到终端在切换， 所述 DPF发送失败的资源预留响应给 Authenticator, 失 败原因为切换；
所述 Authenticator设置为： 收到所述失败的资源预留响应后， 获知失败 原因为切换， 终止所述业务流的建立过程。
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