WO2012136088A1 - Procédé et système de rapport d'informations de tunnel - Google Patents

Procédé et système de rapport d'informations de tunnel Download PDF

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Publication number
WO2012136088A1
WO2012136088A1 PCT/CN2012/072046 CN2012072046W WO2012136088A1 WO 2012136088 A1 WO2012136088 A1 WO 2012136088A1 CN 2012072046 W CN2012072046 W CN 2012072046W WO 2012136088 A1 WO2012136088 A1 WO 2012136088A1
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WIPO (PCT)
Prior art keywords
tunnel information
mme
bpcf
pcrf
tau
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PCT/CN2012/072046
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English (en)
Chinese (zh)
Inventor
毕以峰
刘国燕
宗在峰
周晓云
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中兴通讯股份有限公司
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Publication of WO2012136088A1 publication Critical patent/WO2012136088A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like

Definitions

  • the present invention relates to a mobile network and a fixed network convergence technology in the field of communications, and in particular, to a method and system for reporting tunnel information. Background technique
  • Evolved Universal Terrestrial Radio Access Network Evolved Universal Terrestrial Radio Access Network
  • Mobile Management Evolved Universal Terrestrial Radio Access Network
  • E-UTRAN Mobile Management
  • 3GPP 3rd Generation Partnership Project Unit
  • MME Mobility Management Entity
  • S-GW Serving Gateway
  • P-GW Packet Data Network Gateway
  • HSS Home Subscriber Server
  • 3GPP authentication and authorization AAA Authentication, Authorization and Accounting (Server, Policy and Charging Rules Function) and other supporting nodes. It is shown in the EPS box in Figure 1.
  • the MME is responsible for control planes such as mobility management, non-access stratum signaling processing, and user mobility management context management;
  • the S-GW is an access gateway device connected to the E-UTRAN, in the E-UTRAN and The P-GW forwards data and is responsible for buffering the paging waiting data.
  • the P-GW is a border gateway between the EPS and the Packet Data Network (PDN), which is responsible for PDN access and forwarding between the EPS and the PDN.
  • PDN Packet Data Network
  • the PCRF is a policy and charging rule function entity.
  • IP operator network protocol
  • Rx receiving interface
  • Gx/Gxc gateway device in the network
  • QoS quality of service
  • the EPS system supports access by an evolved home base station (HeNB, Home evolved NodeB, also referred to as a home base station in the present invention), as shown in FIG.
  • HeNB evolved home base station
  • the HeNB is a small, low-power base station deployed in indoor locations such as homes, offices, and corporate buildings.
  • the HeNB usually accesses the core network of the EPS through a leased fixed line.
  • the security gateway (SeGW, Security Gateway) is shielded in the core network, and the data between the HeNB and the SeGW is encapsulated by Internet Protocol Security (IPSec).
  • IPSec Internet Protocol Security
  • the HeNB can be directly connected to the MME and the S-GW of the core network through the IPSec tunnel established with the SeGW, or can be connected to the MME and the S-GW through the HeNB GW, that is, the HeNB GW is an optional network element.
  • HeMS Home eNodeB Management System
  • UMTS Universal Mobile Telecommunications System
  • B home base station
  • the related art is similar to HeNB.
  • the QoS of the fixed line of the H(e)NB (that is, the collective name of the HeNB and the HNB) is usually restricted by the contract of the owner of the H(e)NB and the fixed network operator, when the 3GPP UE passes the H (e)
  • the required QoS cannot exceed the QoS of the fixed line subscription that the fixed network operator can provide. Otherwise, the QoS of the UE access service will not be guaranteed, especially for the service that guarantees the bit rate (GBR, Guaranteed Bitrate). Therefore, for 3GPP networks and fixed networks, a unified management mechanism is needed to implement user/connection/service admission control.
  • the scheme that has been initially accepted by the standards organization is shown in Figure 1 (HeNB case).
  • the PCF (Policy Control and Charging) of the 3GPP system is connected to the fixed-band policy control function (BPCF) through the S9* interface to implement policy interworking and resource management.
  • BPCF fixed-band policy control function
  • the fixed network needs to locate the fixed line of the current H(e)NB (the technical specification is called backhaul, that is, the fixed network backhaul network). ).
  • the fixed network line is located through information such as the outer layer of the H(e)NB or the local IP address and port number.
  • the information is sent by the terminal (UE, User Equipment) from the H(e)NB attaching process or the PDN connection establishing process to the PCRF.
  • the PCRF finds the BPCF of the fixed network line that manages the H(e)NB, and Establish an S9* session.
  • the UE switches from the macro cell to the micro cell, and can also switch between different micro cells.
  • the specific process is shown in FIG. 2, which mainly includes the following steps:
  • Step 201 The UE accesses from a source base station (a macro cell or a micro cell base station, an S-(H)eNB), initiates a handover at a certain time, and the UE selects to access from the target base station T-HeNB.
  • a source base station a macro cell or a micro cell base station, an S-(H)eNB
  • Step 202 The S-(H)eNB sends a handover request message to the source MME (ie, the S-MME).
  • Step 203 The S-MME sends a Forward Relocation Request message to the target MME (ie, the T-MME), where the message is used to deliver the context information to the target side, and the target side is notified to perform the handover operation.
  • Step 204 If the S-GW relocation occurs, the T-MME sends a create session request message to the target S-GW (ie, the TS-GW), and receives a create session response message from the TS-GW. If the S-GW relocation does not occur, that is, the SS-GW and the TS-GW are the same gateway, the operation of this step is skipped.
  • Step 205 The T-MME sends a handover request message to the target base station T-HeNB, and receives a handover confirmation message that is sent by the T-HeNB. If the S-GW relocation occurs in the previous step 204, the step 205 needs to be created. User plane data channel between the T-HeNB and the TS-GW.
  • Step 206 The T-MME sends a Forward Relocation Response message to the S-MME as a response to step 203.
  • Step 207 The S-MME sends a handover instruction to the source base station, and the source base station forwards the handover instruction to the UE, to notify the UE to switch.
  • Step 209 The T-HeNB sends a handover notification message to the T-MME.
  • Step 210 The T-MME and the S-MME exchange the relocation completion notification/confirmation message.
  • the S-S-GW responds with a modified bearer response message.
  • the TS-GW is the SS-GW; the T-MME only interworks with the S-GW to modify the bearer request/response message, and the interaction message between the S-GW and the P-GW is not executed. .
  • Step 212 If the P-GW receives the modify bearer request message from the S-GW, the P-GW and the PCRF interwork IP connection access network (IP-CAN, IP-Connectivity Access Network) session modification step is used to update the IP-CAN Session: If the P-GW does not receive the trigger message or there is no special information in the bearer modification message received by the P-GW for notification to the PCRF, the step is skipped.
  • IP-CAN IP-Connectivity Access Network
  • Step 213 After the terminal switches to the target base station, the TAU (Tracking Area Update) operation is initiated, and the user updates the mobility management context of the UE in the MME.
  • TAU Track Area Update
  • the TAU operation is referred to as a TAIL step 214 for handover between a base station (HeNB or eNB), and the S-MME sends a UE context release instruction message to the source base station to release the context of the user on the source network side.
  • a base station HeNB or eNB
  • the S-MME sends a UE context release instruction message to the source base station to release the context of the user on the source network side.
  • the terminal may perform relocation due to load sharing and other problems, resulting in no replacement of the HeNB or eNB and relocation of the S-GW or MME. In this case, the S-GW cannot obtain the correct tunnel.
  • the information which causes the BPCF to fail to implement policy interworking or interworking errors, can not guarantee the HQoS of the HeNB.
  • the main purpose of the present invention is to provide a method and system for reporting tunnel information, so as to implement policy interworking between the mobile network and the fixed network, and ensure QoS of the home base station.
  • the invention provides a method for reporting tunnel information, the method comprising:
  • the mobility management unit notifies the acquired tunnel information to the gateway of the evolved packet core network (EPC) when receiving the tracking area update (TAU) message and determining that any one or more of the following conditions are met:
  • the TAU is a TAU in which a handover occurs across a home base station
  • the TAU is a TAU in which MME replacement occurs
  • the TAU is a TAU replaced by a serving gateway (S-GW)
  • S-GW serving gateway
  • MME serving gateway
  • the tunnel information is inconsistent, and the tunnel information received by the target mobility management unit (T-MME) from the source mobility management unit (S-MME) is inconsistent with the tunnel information received from the home base station;
  • the gateway of the EPC sends the tunnel information to a fixed network policy control function entity (BPCF) through a policy and charging rule function entity (PCRF).
  • BPCF policy control function entity
  • PCRF policy and charging rule function entity
  • the method further includes: when the TAU is in operation, the home base station transmits the tunnel information to the MME by using an initial UE message or an uplink non-access stratum (NAS).
  • the home base station transmits the tunnel information to the MME by using an initial UE message or an uplink non-access stratum (NAS).
  • NAS uplink non-access stratum
  • the gateway of the EPC includes an S-GW and a Packet Data Network Gateway (P-GW).
  • P-GW Packet Data Network Gateway
  • the MME notifies the tunnel information to the gateway of the EPC, and the gateway of the EPC sends the tunnel information to the BPCF of the fixed network through the PCRF, specifically:
  • the MME notifies the S-GW by creating, modifying, or refreshing a session request message or modifying a bearer request message;
  • the S-GW notifies the P-GW by creating, modifying, or refreshing a session request message, or modifying a bearer request message, or a proxy binding update (PBU) message;
  • PBU proxy binding update
  • the P-GW advertises the tunnel information to the PCRF through an IP connection access network (IP-CAN) session modification message;
  • IP-CAN IP connection access network
  • the PCRF advertises the acquired tunnel information to the BPCF by creating or modifying an S9* session operation.
  • the gateway of the EPC includes an S-GW,
  • the MME notifies the tunnel information to the gateway of the EPC, and the gateway of the EPC sends the tunnel information to the BPCF of the fixed network through the PCRF, specifically:
  • the MME notifies the S-GW by creating, modifying, or refreshing a session request message or modifying a bearer request message;
  • the S-GW advertises the tunnel information to the PCRF by using a gateway control session modification message
  • the PCRF advertises the acquired tunnel information to the BPCF by creating or modifying an S9* session operation.
  • the PCRF advertises the acquired tunnel information to the BPCF by establishing or modifying an S9* session operation, specifically:
  • the PCRF selects BPCF according to the acquired tunnel information, initiates an S9* session establishment operation, and sends the tunnel information to the selected BPCF.
  • the PCRF verifies whether the original BPCF is the BPCF indicated by the tunnel information. If yes, the PCRF initiates an S9* session modification operation, and sends the tunnel information to the BPCF; if not, the PCRF is based on The tunnel information newly selects BPCF and initiates an S9* session establishment operation, and sends the tunnel information to the newly selected BPCF.
  • the tunnel information includes a local IP address of the home base station.
  • the tunnel information also includes one or more of the following information: The full name of the BPCF (FQDN);
  • the local port number of the home base station is the local port number of the home base station
  • IP Security IP Security
  • SeGW security gateway
  • the identity of the home base station is the identity of the home base station
  • VLAN ID virtual local area network identifier
  • the present invention also provides a system for reporting tunnel information, the system comprising: a gateway of an MME and an EPC, where
  • the MME is configured to: when the TAU message is received and the one or more combinations of the following conditions are met, the obtained tunnel information is notified to the gateway of the EPC: the TAU is a cross-home base station handover.
  • the TAU the TAU is a TAU in which MME replacement occurs
  • the TAU is a TAU in which S-GW replacement occurs
  • the tunnel information received from the home base station is inconsistent with the tunnel information stored in the MME
  • the T-MME is received from the S-MME.
  • the tunnel information that arrives is inconsistent with the tunnel information received from the home base station;
  • the gateway of the EPC is configured to send the tunnel information to the BPCF of the fixed network through the PCRF.
  • the system further includes: a home base station, configured to carry the tunnel information to the MME by using an initial UE message or an uplink NAS to transmit a message during the TAU operation.
  • the gateway of the EPC includes an S-GW and a P-GW,
  • the MME is further configured to: notify the S-GW by creating, modifying, or refreshing a session request message, or modifying a bearer request message;
  • the S-GW is configured to notify the P-GW by creating, modifying, or refreshing a session request message, or modifying a bearer request message, or a PBU message;
  • the P-GW configured to advertise the tunnel information to the PCRF by using an IP-CAN session modification message
  • the PCRF is configured to pass the acquired tunnel information by creating or modifying an S9* session operation. Tell the BPCF.
  • the gateway of the EPC includes an S-GW,
  • the MME is further configured to: notify the S-GW by creating, modifying, or refreshing a session request message, or modifying a bearer request message;
  • the S-GW is configured to notify the PCRF of the tunnel information by using a gateway control session modification message
  • the PCRF is configured to advertise the acquired tunnel information to the BPCF by creating or modifying an S9* session operation.
  • the PCRF is further used,
  • the BPCF is selected according to the acquired tunnel information, the S9* session establishment operation is initiated, and the tunnel information is sent to the selected BPCF;
  • the tunnel information includes a local IP address of the home base station.
  • the tunnel information also includes one or more of the following information:
  • the local port number of the home base station is the local port number of the home base station
  • the identity of the home base station is the identity of the home base station
  • the VLAN ID where the home base station is located is located.
  • the method and system for reporting tunnel information provided by the present invention when the MME receives the TAU message and determines that any one or more of the following conditions are met, the MME notifies the tunnel information to the EPC gateway:
  • the TAU and TAU of the home base station handover are MME replacement.
  • the TAU and TAU are TAUs in which S-GW replacement occurs, the tunnel information received from the home base station is inconsistent with the tunnel information stored by the MME, and the target mobility management unit (T-MME) receives from the source mobility management unit (S-MME).
  • the tunnel information is inconsistent with the tunnel information received from the home base station; the EPC gateway sends the received tunnel information to the BPCF of the fixed network through the PCRF.
  • the TAU operation enables the S-GW to acquire the tunnel information, and ensures that The gateway control session establishment/modification operation and PBU operation carry the correct tunnel information; if the tunnel information changes, BPCF can obtain the correct tunnel information.
  • the policy interworking between the mobile network and the fixed network is realized, and the QoS of the home base station is guaranteed.
  • FIG. 1 is an architectural diagram of an EPS, a fixed network, and an H(e)NB fusion in the prior art
  • FIG. 1 is a flowchart of handover of a UE across a base station in the prior art
  • FIG. 3 is a flowchart of a method for reporting tunnel information according to the present invention.
  • FIG. 5 is a flowchart of a method for reporting tunnel information according to Embodiment 2 of the present invention. detailed description
  • the tunnel information in the embodiment of the present invention is introduced.
  • an IPsec tunnel is established between the HeNB and the SeGW, as shown in FIG. 1, where the HeNB and the SeGW are respectively two endpoints of the IPsec tunnel.
  • the tunnel information in the embodiment of the present invention is an outer IP address of the HeNB, which is one of the endpoints of the IPsec tunnel, or a local IP address of the HeNB, and may include one or more of the following information:
  • the outer port number of the HeNB (or the local port number of the HeNB).
  • the port number can be used.
  • Port number of the User Datagram Protocol (UDP) UDP
  • One of the endpoints of the IPsec tunnel SeGW address and / or port number UDP port number
  • HeNB identity such as Global Mobile Station / Terminal Identity (IMSI, International Mobile
  • Virtual LAN ID where the HeNB is located (VLAN ID, Virtual Local Area Network
  • the outer/local IP address of the HeNB is allocated by the fixed network/WLAN (Wireless LAN) access network. If there is a network address translation (NAT) in the WLAN network, it is a NAT converter (The converted public network IP address and UDP port number are used by the home gateway (RG, Residential Gateway).
  • NAT network address translation
  • the tunnel information includes fixed network information such as the local/sumer layer IP address (and port number) of the HeNB. Because the tunnel information is provided by the WLAN access network/fixed network, the PCRF can select to serve the node according to the address.
  • the BPCF fixed network/WLAN access network element
  • the WLAN access network/fixed network can locate the fixed network line where the HeNB is located according to the tunnel information, and can be based on the policy rules. Guarantee QoS on this line.
  • the RG or the RG that functions as the router does not work in the bridge mode, so that the IP address obtained by the HeNB during the access is uniquely identified and located by the fixed network/WLAN access network.
  • the fixed network line where the HeNB is located can be located; the address is allocated by the relevant network element when the HeNB accesses the fixed network/WLAN access network (for example, a broadband access service gateway/broadband remote access server ( BNG/BRAS, Broadband Network Gateway/Broadband Remote Access Server)), this address is the local/single layer IP address.
  • BNG/BRAS Broadband Network Gateway/Broadband Remote Access Server
  • the HeNB accesses the fixed network/WLAN access network and passes the RG function as a router function, the address obtained by the HeNB during the access is the private IP address assigned by the RG, and the address cannot participate in the tunnel information.
  • the SeGW feeds back the outer/local IP address and UDP port number of the RG as the network address translation.
  • the HeNB constructs the tunnel information by using the address, and can locate the fixed network line where the HeNB is located according to the address.
  • the tunnel information may also include information such as the FQDN of the BPCF.
  • a method for reporting tunnel information provided by the present invention, as shown in FIG. 3, mainly includes the following steps:
  • Step 301 The MME notifies the obtained tunnel information to the EPC gateway when receiving the TAU message and determining that any one or more of the following conditions are met:
  • the TAU is a TAU that occurs handover across a home base station
  • the TAU is a TAU in which MME replacement occurs
  • the TAU is a TAU in which S-GW replacement occurs
  • the tunnel information received from the home base station is inconsistent with the tunnel information stored by the MME; the tunnel information received by the target mobility management unit (T-MME) from the source mobility management unit (S-MME) and the tunnel received from the home base station Inconsistent information.
  • the home base station can transmit the tunnel information to the MME by using an initial UE message or an uplink non-access stratum (NAS, Non-Access Stratum) during the TAU operation.
  • NAS Non-Access Stratum
  • Step 302 The EPC gateway sends the tunnel information to the BPCF through the PCRF.
  • the gateway of the EPC may include an S-GW and a P-GW, and correspondingly, the
  • the MME notifies the tunnel information to the gateway of the EPC, and the gateway of the EPC sends the tunnel information to the BPCF of the fixed network through the PCRF, which is specifically:
  • the MME notifies the S-GW of the tunnel information by creating, modifying, or refreshing the session request message or modifying the bearer request message;
  • the S-GW advertises the tunnel information to the P-GW by creating, modifying, or refreshing the session request message, or modifying the bearer request message, or the Proxy Binding Update (PBU) message;
  • PBU Proxy Binding Update
  • the P-GW notifies the tunnel information to the PCRF through the IP-CAN session modification message
  • the PCRF advertises the acquired tunnel information to the BPCF by creating or modifying an S9* session.
  • the gateway of the EPC may also include only the S-GW. Then, the MME notifies the tunnel information to the gateway of the EPC, and the gateway of the EPC sends the tunnel information to the BPCF of the fixed network through the PCRF, specifically:
  • the MME notifies the tunnel information to the S-GW by creating, modifying, or refreshing the session request message or modifying the bearer request message;
  • the S-GW notifies the tunnel information to the PCRF through the gateway control session modification message
  • the PCRF advertises the acquired tunnel information to the BPCF by creating or modifying an S9* session.
  • the system for reporting tunnel information provided by the present invention needs to include at least: a gateway of the MME and the EPC, where
  • the MME is configured to notify the EPC gateway of the acquired tunnel information when receiving the TAU message and determining that any one or more of the following conditions are met: the TAU is a TAU that occurs handover across the home base station, and the TAU is the occurrence MME.
  • the replaced TAU and TAU are the TAUs in which the S-GW is replaced, the tunnel information received from the home base station is inconsistent with the tunnel information stored by the MME, the tunnel information received by the T-MME from the S-MME, and the tunnel received from the home base station. Inconsistent information;
  • the gateway of the EPC is used to send the received tunnel information to the BPCF of the fixed network through the PCRF.
  • the system may further include: a home base station, configured to carry the tunnel information to the MME by using the initial UE message or the uplink NAS to transmit the message during the TAU operation.
  • the gateway of the EPC may include an S-GW and a P-GW.
  • the MME is further configured to notify the tunnel information by creating, modifying, or refreshing the session request message or modifying the bearer request message. GW;
  • the S-GW is configured to notify the P-GW of the tunnel information by creating, modifying, or refreshing the session request message, or modifying the bearer request message, or the PBU message;
  • a P-GW configured to notify the tunnel information to the PCRF by using an IP-CAN session modification message
  • the PCRF is used to advertise the tunnel information to the BPCF by creating or modifying an S9* session operation.
  • the gateway of the EPC may also include only the S-GW, and correspondingly, the MME is further used for After the session request message is created, modified, or refreshed, or the bearer request message is modified, the tunnel information is advertised to the S-GW;
  • the S-GW is configured to advertise the tunnel information to the PCRF through the gateway control session modification message.
  • the PCRF is used to notify the BPCF of the obtained tunnel information by creating or modifying an S9* session operation.
  • the UE reports the tunnel information to the MME during the TAU operation.
  • the MME determines whether it needs to update the tunnel information to the core network and the fixed network according to the conditions. If the update is required, the UE passes the session. The operation or bearer modification operation is performed, and the PCC session operation reports the tunnel information in turn; if the update is not required, the existing TAU operation is performed without any modification to the prior art.
  • the specific process includes the following steps:
  • Step 401 The UE accesses the EPC from the macro base station or the home base station.
  • a GTP tunnel is established between the source S-GW (ie SS-GW) and the P-GW; an IP-CAN session is established between the PCRF and the P-GW; an S9* session is established between the PCRF and the BPCF (HeNB access) Or, no S9* session (macrocell access) is established.
  • Step 402 The UE is triggered to initiate a TAU operation, and the specific trigger condition may be one or more of the following conditions (the following is an example, and other reasons are not excluded):
  • Periodic TAU The UE updates its own tracking area (TA, Tracking Area) to the core network at a fixed time.
  • the operation is TAU;
  • the UE has moved and replaced the TA
  • the UE has a handover between the base station (including the macro base station and the HeNB);
  • Load balancing leads to TAU (the HeNB may not change in this scenario, but the MME or S-GW may be replaced or relocated due to load balancing issues);
  • Step 403 The UE sends a TAU request message to the target MME (ie, the T-MME).
  • the target MME ie, the T-MME
  • the TAU request message is a message from the UE to the T-MME that transmits the HeNB. After the message arrives at the HeNB, the HeNB encapsulates the message into a cell, and sends it to the T1 interface message sent by the HeNB to the T-MME to the T.
  • the specific S1 interface message may be: an initial UE message or an uplink non-access stratum (NAS, Non-Access Stratum).
  • the HeNB is required to carry the tunnel information of the HeNB to the MME in the initial UE message or the uplink NAS transport message during the TAU operation (or T-MME if the MME is replaced, as shown in the figure).
  • Step 404 The T-MME sends a context request message to the source MME (ie, the S-MME), where the message is used to request the context information of the UE from the source MME; the S-MME returns a context response message to the T-MME, and the S-MME The context information of the UE stored by the MME is sent to the T-MME.
  • the source MME ie, the S-MME
  • the S-MME returns a context response message to the T-MME
  • S-MME The context information of the UE stored by the MME is sent to the T-MME.
  • the S-MME is required to send the stored tunnel information to the T-MME, specifically:
  • the tunnel information sent by the S-MME is the tunnel information of the source side HeNB, and the tunnel information is obtained by the S-MME before the TAU occurs;
  • the tunnel information sent by the S-MME is null or there is no tunnel information in the context
  • the S-MME sends the tunnel information of the HeNB, and the tunnel information is obtained by the S-MME before the TAU occurs;
  • step 404 skips execution.
  • step 405 this step is an optional step. If the integrity authentication of the TAU message fails, the MME A re-authentication of the terminal will be initiated.
  • Step 406 The T-MME sends a context response message to the S-MME.
  • Step 406a before performing step 407, the T-MME needs to perform internal decision/judgment processing: if the tunnel information received by the T-MME from the HeNB is different from the tunnel information received from the S-MME, the T-MME decides to pass Step 407, reporting the latest tunnel information (that is, the tunnel information acquired from the HeNB);
  • the MME decides to pass the latest tunnel information (ie, the tunnel information acquired from the HeNB) in step 407;
  • the MME decides to report the latest tunnel information (that is, the tunnel information acquired from the HeNB) through step 407;
  • the MME decides to report the latest tunnel information (that is, the tunnel information acquired from the HeNB) through step 407;
  • the MME decides to report the latest tunnel information through step 407.
  • Step 407 According to the decision of step 406a, the T-MME reports or does not report the tunnel information to the S-GW. In the case where the decision does not report the tunnel information, the subsequent steps are performed according to the prior art; in the case of deciding to report the tunnel information:
  • the T-MME sends a create session request message to the T-S-GW, where the message carries the tunnel information;
  • the T-MME sends a modify bearer request message to the S-GW, where the message carries the tunnel information.
  • Step 408 If the TS-GW receives the tunnel information carried in step 407, the TS-GW sends a modify bearer request message to the P-GW. In response, the P-GW sends a modify bearer response message to the TS-GW. In this way, the tunnel information is reported to the P-GW.
  • Step 409 If the P-GW receives the tunnel information carried in step 408, the P-GW initiates an IP-CAN session modification operation to the PCRF, and reports the tunnel information to the PCRF.
  • Step 409a If the PCRF receives the tunnel information carried in step 409, the PCRF initiates an S9* session establishment/modification operation to the BPCF of the fixed network, and reports the tunnel information to the BPCF of the fixed network, specifically:
  • the PCRF selects the BPCF according to the acquired tunnel information, initiates an S9* session establishment operation, and sends the tunnel information to the selected BPCF; if there is an S9* session between the PCRF and the BPCF Then, the PCRF verifies whether the original BPCF is the BPCF indicated by the tunnel information: If yes, the PCRF initiates an S9* session modification operation, and sends the tunnel information to the BPCF; if not, the PCRF newly selects the BPCF according to the tunnel information and initiates the S9* session. Establish an operation to send tunnel information to the newly selected BPCF.
  • Step 410 After receiving the response message of step 408, the T-S-GW responds to the S-MME to create a session response/modify bearer response message.
  • Step 411 After TAU, the T-MME and the S-MME and the HSS perform location update and location cancel operations.
  • Step 412 the source side resource and the context are released.
  • Step 413 The T-MME and the UE exchange TAU accept/confirm messages.
  • the S-GW, the P-GW, and the PCRF are reported to the rear in turn, optionally as an optimization method, S-GW, P-GW, and PCRF.
  • the tunnel information is received, if the tunnel information is found to be the same as the original tunnel information on the network element, any network element may decide not to report the tunnel information to the rear.
  • the HeNB can configure the fixed network support for the fixed network backhaul where the HeNB is located, and does not support the policy for interworking with the EPC, so that the HeNB can advertise the information (such as through the network management information or the S1 interface message). MME, so the MME is making a decision When reporting the tunnel information, you can consider this situation. That is, if the fixed network where the HeNB is located does not support policy interworking with the EPC, the MME will not report the tunnel information to the GW and PCRF of the EPC through the above steps.
  • the second embodiment of the present invention is as shown in FIG. 5.
  • the basic principle of the embodiment is the same as that of the first embodiment. The difference is reflected in how the tunnel information is reported after the S-GW arrives at the S-GW.
  • the tunnel information is S- The GW reports the bearer request message to the P-GW, and then the P-GW reports the PCRF to the BPCF.
  • the second embodiment of this embodiment There are two different specific implementations of the second embodiment of this embodiment:
  • the S-GW reports the PBU message to the P-GW, and the P-GW returns a PBA (Proxy Binding Acknowledgement) message to the S-GW, and the subsequent operations (steps 509-513) Corresponding steps of the first embodiment (steps 409 to 413);
  • PBA Proxy Binding Acknowledgement
  • the S-GW reports the session establishment operation (S-GW relocation) or the modification operation (the S-GW does not relocate) to the PCRF (shown in step 507a). Then, the PCRF is reported to the BPCF (step 509a), and the subsequent operations (steps 510-513) are the same as the corresponding steps of the first embodiment (steps 410-413).
  • Step 501 to 507 corresponds to one step (step 401 ⁇ 407) same embodiment 0
  • the two problems raised in the background art are mainly solved: 1.
  • the S-GW has no tunnel information (for example, if the S-GW is relocated, the target S-GW has no tunnel information)
  • the TAU operation shown in the foregoing embodiment enables the S-GW to obtain the tunnel information, and ensures that the correct tunnel information is carried in the subsequent gateway control session establishment/modification operation and PBU operation.
  • the tunnel information changes.
  • BPCF can obtain the correct tunnel information. Thereby, the policy interworking between the mobile network and the fixed network is realized, and the QoS of the home base station is guaranteed.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention porte sur un procédé et un système de rapport d'informations de tunnel. Le procédé comprend les opérations suivantes : lors de la réception d'un message de mise à jour de zone de suivi (TAU) et de la détermination du fait qu'au moins une des conditions suivantes est satisfaite, une entité de gestion de mobilité (MME) notifie à la passerelle du réseau cœur paquet évolué (EPC) les informations de tunnel obtenues : TAU a un transfert entre des nœuds B domestiques, TAU a un remplacement de MME, TAU a un remplacement de passerelle de desserte (S-GW), les informations de tunnel reçues en provenance du nœud B domestique sont incompatibles avec les informations de tunnel stockées par la MME, les informations de tunnel reçues par la MME cible en provenance de la MME source sont incompatibles avec les informations de tunnel reçues en provenance du nœud B domestique ; et la passerelle de l'EPC envoie les informations de tunnel à l'entité à fonction de commande de politique du réseau fixe au moyen de l'entité à fonction de règles de politique et de facturation (PCRF). La présente invention réalise une intercommunication stratégique entre des réseaux mobiles et des réseaux fixes et assure la qualité de service (QoS) du nœud B domestique.
PCT/CN2012/072046 2011-04-06 2012-03-07 Procédé et système de rapport d'informations de tunnel WO2012136088A1 (fr)

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