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WO2010078725A1 - Procédé de transfert de réseau, équipement utilisateur, passerelle et système de réseau afférent - Google Patents

Procédé de transfert de réseau, équipement utilisateur, passerelle et système de réseau afférent Download PDF

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Publication number
WO2010078725A1
WO2010078725A1 PCT/CN2009/070085 CN2009070085W WO2010078725A1 WO 2010078725 A1 WO2010078725 A1 WO 2010078725A1 CN 2009070085 W CN2009070085 W CN 2009070085W WO 2010078725 A1 WO2010078725 A1 WO 2010078725A1
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WO
WIPO (PCT)
Prior art keywords
terminal
network
ehrpd
registration
lte
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2009/070085
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English (en)
Chinese (zh)
Inventor
刘清顺
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to PCT/CN2009/070085 priority Critical patent/WO2010078725A1/fr
Priority to CN200980150126.4A priority patent/CN102177748B/zh
Publication of WO2010078725A1 publication Critical patent/WO2010078725A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0033—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0016—Hand-off preparation specially adapted for end-to-end data sessions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/16—Gateway arrangements

Definitions

  • Network switching method terminal, gateway and network system
  • the present invention relates to the field of mobile communications technologies, and in particular, to a network switching method, a terminal, a gateway, and a network system. Background technique
  • LTE Long Term Evolution
  • 3GPP Third Generation Partnership Project
  • P-GW PDN Gateway
  • MME Mobility Management Entity
  • the evolved network does not provide traditional circuit-switched voice functions, and only provides high-rate data bearer services.
  • the evolved network can also support interworking with 3GPP's third-generation wireless data networks and second- and fifth-generation wireless data networks.
  • HRPD High Rate Packet Data
  • 3GPP2 Third Generation
  • an HRPD network an AN (Access Network) entity is a network element, which is equivalent to a base station and a base station controller, and is responsible for functions such as modulation, demodulation, and handover of data.
  • the PCF (Packet Control Function) entity is responsible for data forwarding and packet data session state maintenance.
  • eHRPD evolved High Rate Packet Data
  • LTE Long Term Evolution
  • the first mode is non-optimized handover.
  • the LTE and the eHRPD are connected to the EPC (Evolved Packet Core) network.
  • the access anchor is the PDN. Gateway.
  • the UE When the UE performs the handover between LTE and eHRPD, the UE performs eHRPD session negotiation, Point-to-Point Protocol (PPP) negotiation, and EAP-AKA (Extensible Authentication Protocol-Authentication and Key Agreement) in the eHRPD network. Authentication, protocol-authentication and key agreement) authentication, then the HSGW (HRPD Serving Gateway, HRPD Serving Gateway) initiates the proxy mobile IP tunnel establishment to the PDN Gateway, and the PDN Gateway releases the PDN Gateway to the S-GW (Serving The proxy mobile IP tunnel between the Gateway and the service gateway completes the handover of the LTE network to the eHRPD network.
  • PPP Point-to-Point Protocol
  • EAP-AKA Extensible Authentication Protocol-Authentication and Key Agreement
  • the second method is to optimize the handover.
  • two interfaces are added between the LTE network and the eHRPD network.
  • One interface is the S101 interface between the MME and the evolved access network (eAN).
  • eAN evolved access network
  • the data retained by the 3GPP evolved network is sent to the eHRPD network and then transmitted to the UE through the eHRPD network.
  • the S101 tunnel sends a handover message to the target eHRPD.
  • the target eHRPD allocates radio resources, the UE then leaves the LTE access target eHRPD, thereby greatly shortening the handover time.
  • the S103 tunnel can also be used to solve the problem of lossless transmission of data, and reduce the packet loss rate during transmission.
  • the UE when the UE decides to initiate a handover from LTE to eHRPD, it leaves the source LTE network, and performs eHRPD session negotiation, PPP negotiation, and EAP-AKA authentication on the target eHRPD network, because these processes are usually performed. It takes a few seconds, resulting in a long interruption of the switch, which affects the user experience.
  • the second method greatly reduces the service interruption time of the LTE to eHRPD handover.
  • two interfaces need to be added between the LTE and the eHRPD network, which increases the network complexity and needs to modify the protocol stack of the UE.
  • LTE sends eHRPD messages, which increases the complexity of the UE. Summary of the invention
  • the embodiments of the present invention provide a network handover method, a terminal, a gateway, and a network system, which can shorten the handover time of the UE from the LTE network to the eHRPD network and reduce the complexity of the network and the UE.
  • a network handover method applied to a long-term evolution LTE network and an evolved high-rate packet data eHRPD network, including:
  • the eHRPD network side establishes a proxy mobile IP tunnel from the high rate packet data serving gateway HSGW to the packet data network gateway P-GW, and the proxy mobile IP tunnel completes the handover of the terminal to the eHRPD network.
  • a terminal comprising: a registration module, configured to: when the terminal camps on the Long Term Evolution (LTE) network, perform registration of the eHRPD network by using the evolved high-rate packet data eHRPD air interface according to the indication of the LTE network;
  • LTE Long Term Evolution
  • a triggering module configured to: when the registration module completes registration and the terminal decides to switch to the eHRPD network, establish an air interface connection, triggering the eHRPD network to establish a high-rate packet data serving gateway HSGW to a packet data network gateway P- The proxy mobile IP tunnel of the GW, the handover of the terminal from the LTE network to the eHRPD network is completed by the proxy mobile IP tunnel.
  • a gateway is located in an evolved high-rate packet data eHRPD network, where the gateway includes:
  • a receiving module configured to receive a request message sent by the terminal during the registration process of the eHRPD network
  • the tunnel establishment module is configured to determine whether the content of the attachment type field carried in the request message received by the receiving module is a registration, and if yes, the proxy mobile IP to the packet data network gateway P-GW is not established in the registration process.
  • a tunnel when the terminal completes registration from the LTE network to the eHRPD network and decides to switch to the eHRPD network, establishing a proxy mobile IP tunnel to the P-GW, which is completed by the proxy mobile IP tunnel Switching of the terminal to the eHRPD network.
  • a network system including:
  • a terminal configured to perform registration of an eHRPD network through an eHRPD air interface according to an indication from the LTE network, establish an air interface connection with the eHRPD network, and trigger the eHRPD network to be established from a high level.
  • HSGW high rate packet data serving gateway
  • a proxy mobile IP tunnel to the packet data network gateway P-GW is established, and the proxy mobile IP tunnel completes the handover of the terminal from the LTE network to the eHRPD network.
  • the eHRPD network is registered in the LTE network through the eHRPD air interface before the UE decides to initiate the handover from the LTE to the eHRPD, which greatly reduces the handover interruption time and improves the user experience, and does not need to be in the LTE and eHRPD.
  • Adding interfaces between networks reduces the complexity of the network, and does not need to modify the protocol stack of the UE, which reduces the complexity of the UE.
  • FIG. 1 is a structural diagram of an LTE network and an eHRPD network according to an embodiment of the present invention
  • FIG. 2 is a flowchart of a network switching method according to an embodiment of the present invention.
  • FIG. 3 is a flow chart of registration in a network switching method according to an embodiment of the present invention.
  • FIG. 4 is a flowchart of a handover in a network switching method according to an embodiment of the present invention.
  • FIG. 5 is a flowchart of air interface session keep-alive provided by an embodiment of the present invention.
  • FIG. 6 is a flowchart of a subnet change process according to an embodiment of the present invention.
  • FIG. 7 is another switching flowchart provided by an embodiment of the present invention.
  • FIG. 8 is a flowchart of another network switching method according to an embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of a terminal according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic structural diagram of a base station according to an embodiment of the present disclosure.
  • FIG. 11 is a schematic structural diagram of a gateway according to an embodiment of the present invention.
  • FIG. 12 is a schematic structural diagram of an eAN according to an embodiment of the present invention.
  • FIG. 13 is a schematic structural diagram of a network system according to an embodiment of the present invention. detailed description
  • the technical solution provided by the embodiment of the present invention is applied to a scenario in which a terminal performs handover on an LTE network and an eHRPD network, and the network architecture is as shown in FIG. 1 .
  • the network architecture is as shown in FIG. 1 .
  • an LTE network which provides services for the terminal UE through the eNodeB (evolved base station), and an eHRPD network below the dotted line, and provides services for the terminal UE through the HRPD BTS (Base Transceiver Station).
  • eNodeB evolved base station
  • HRPD BTS Base Transceiver Station
  • the terminal in the embodiment of the present invention includes a dual mode terminal and a multimode terminal, for example, a dual mode terminal supporting LTE network access technology and eHRPD network access technology, and supporting HRPD access technology, CDMA2000 lx access technology, and LTE connection. Multi-mode terminal into technology.
  • the dual-mode terminal further includes a single-transmitting dual-receiving terminal and a dual-issue dual-receiving terminal.
  • a single-transmit dual-receiver terminal refers to a dual-mode terminal with two receivers and one transmitter, which can receive information of two networks (different radio access technologies) at the same time, but at a certain moment, only one network Send information, but not both networks Interest.
  • a dual-transmit dual-receiver terminal refers to a dual-mode terminal with two receivers and two transmitters, which can receive information of two networks at the same time, and can simultaneously transmit information on two networks.
  • the cost of a single-issue dual-receiver terminal is lower than that of a dual-issue dual-receiving terminal, and one transmitter consumes less power.
  • the dual-issue dual-receiving terminal has a higher cost than a single-issue dual-receiving terminal, and the two transmitters consume more power.
  • an embodiment of the present invention provides a network switching method, which may include:
  • the terminal residing on the LTE network performs the registration of the eHRPD network through the eHRPD air interface according to the indication of the LTE network;
  • the registration process includes: eHRPD session negotiation, PPP negotiation, and EAP-AKA authentication;
  • EAP-AKA is a two-way authentication protocol, which can mutually authenticate the terminal and the network;
  • MIP Mobile IP
  • PMIP Proxy Mobile IP
  • the terminal does not need to support the mobile IP protocol, which simplifies. Terminal processing;
  • the proxy mobile IP tunnel is established between the HSGW and the P-GW;
  • the proxy mobile IP tunnel completes the handover of the terminal from the LTE network to the eHRPD network.
  • the method of the embodiment of the present invention can adjust the sequence of each step according to actual needs.
  • the eHRPD network is registered in the LTE network through the eHRPD air interface before the terminal decides to initiate the handover from the LTE to the eHRPD, which greatly reduces the handover interruption time and improves the user experience, and does not need to be in the LTE and eHRPD.
  • Adding interfaces between networks reduces the complexity of the network, and does not need to modify the protocol stack of the terminal, which reduces the complexity of the terminal.
  • the embodiment of the present invention further provides a method for switching an LTE network to an eHRPD network, including two processes of registration and handover.
  • the handover process may include:
  • the terminal is powered on. Since the priority of the LTE network is higher than that of the eHRPD network, the terminal first searches for the LTE network.
  • 302 After the terminal successfully searches for the LTE network, the terminal performs an LTE network registration process in the LTE network, that is, an initial attach process of the LTE network, and the proxy mobile IP tunnel established in the registration process is located at the S-GW and the P. -Between GW.
  • the terminal After receiving the system broadcast message of the LTE network, the terminal determines whether the pre-registration field PreRegistrationAllowed in the system broadcast message is set to “Allow”, that is, determines whether the network side indicates that the terminal is allowed to register to the eHRPD network, if the pre-registration field Set to "Allow”, the terminal searches for the eHRPD network if the pre-registration field is Set to "not allowed", the terminal does not search for the eHRPD network.
  • the terminal searches for the eHRPD network in the LTE idle state; if the terminal is a dual-transmitting dual-receiving terminal, the terminal searches for the eHRPD network in the LTE idle state or the LTE active state.
  • the terminal may also perform other methods for determining, for example, adding a new field in the system broadcast message, by setting the new field.
  • “Allow” or “Disallow” indicates that the terminal is currently allowed to register in the eHRPD network, or indicates that the terminal is currently not allowed to register in the eHRPD network.
  • the eHRPD network is started to register with the eHRPD network, that is, the initial attach process of the eHRPD network is started, and the registration process includes: eHRPD air interface session negotiation, PPP negotiation, and EAP-AKA authentication, etc. However, it does not include the establishment of the PDN connection and the subsequent process.
  • the terminal is a single-issue dual-receiving terminal, the terminal searches for the eHRPD network and then switches to the eHRPD mode to start the eHRPD network registration through the eHRPD air interface. If the terminal is a dual-issue dual-receiving terminal, the eHRPD network is directly started through the eHRPD air interface. registered.
  • the terminal sends a VSNCP (Vendor Specific Network Control Protocol) configuration request message VSNCP Config-Req to the HSGW, requesting to establish a PDN connection, and the Attach Type field in the configuration request message is set to "Registration Only", for example, setting the value of this field to 255, which means "registration", setting the attachment type field to "registration” is used to indicate that the HSGW in the eHRPD network does not need to register in the eHRPD network.
  • the proxy mobile IP tunnel is established to the P-GW.
  • the proxy mobile IP tunnel between the HSGW and the P-GW is established in the process of the terminal switching from the LTE network to the eHRPD network.
  • VSNCP is an extended PPP network control protocol.
  • the VSNCP protocol is usually used to establish a PDN connection.
  • the attachment type field in the VSNCP configuration request message may be set to: "initial attachment”, "switch” or "registration”.
  • the attachment type field is set to "initial attachment” or "switch”
  • the HSGW performs the corresponding processing flow.
  • the PDN ID in the configuration request message can be set to the default PDN ID, which is usually 15. If the terminal has established multiple PDN connections in LTE, the terminal does not need to initiate registration of the non-default PDN connection, but establishes a non-default PDN connection after actually switching to the eHRPD network.
  • the HSGW establishes a gateway control session to the PCRF (Policy and Charging Rules Function) entity, and the gateway control session may not be established when the terminal registers with the eHRPD network, but when the terminal switches to the eHRPD network. Establish again.
  • PCRF Policy and Charging Rules Function
  • the HSGW determines whether the attachment type field in the received VSNCP configuration request message is "registration”, if If yes, the proxy mobile IP tunnel to the P-GW is not established, and the VSNCP configuration confirmation message VSNCP Config-Ack is directly returned to the terminal; otherwise, the corresponding processing flow, such as the initial attach procedure, the handover procedure, etc., is performed according to the content of the attachment type field. Wait.
  • the HSGW sends a VSNCP configuration request message VSNCP Config-Req to the terminal, where the PDN ID carried in the message is the same as the PDN ID in the VSNCP configuration request message sent by the terminal.
  • the terminal After receiving the VSNCP configuration request message sent by the HSGW, the terminal returns a VSNCP configuration confirmation message VSNCP Config-Ack to the HSGW, where the VSNCP configuration confirmation message carries the PDN ID, and the terminal completes the registration process to the eHRPD network.
  • the terminal releases the eHRPD air interface established in the eHRPD network registration process, and enters a sleep state.
  • the terminal negotiates an air interface session and then establishes an air interface connection. After completing the registration to the eHRPD network, the terminal can release the eHRPD air interface connection.
  • the eHRPD air interface session needs to be kept alive.
  • the eHRPD air interface session keeps alive, so that the eHRPD air interface session information is not Lost, eHRPD air interface session information includes but is not limited to: the type of protocol negotiated, the attribute value used by the negotiation protocol, parameters, and so on.
  • the terminal When the terminal is a single-issue dual-receiving terminal, the terminal switches to the LTE mode. If the terminal is a dual-issue dual-receiving terminal, the step is not performed.
  • the terminal suspends the ongoing eHRPD network registration, the registration fails, and processes the paging from the LTE network, when the terminal enters the LTE idle state. Then re-register the eHRPD network.
  • the foregoing process performs the registration process of the eHRPD network for the terminal residing in the LTE network. After the terminal completes the registration to the eHRPD network, if the terminal meets the conditions for switching to the eHRPD network at a certain time, the terminal initiates a handover to the eHRPD network.
  • the switching process may include:
  • the terminal determines that the channel quality of the LTE cell is less than a preset first threshold, and the channel quality of the eHRPD cell is higher than a preset second threshold, the terminal determines to switch to the eHRPD network, and sends a connection request message ConnectionRequest in the eHRPD network.
  • the terminal determines to switch to the eHRPD network, and sends a connection request message ConnectionRequest in the eHRPD network.
  • the values of the first threshold and the second threshold are separately set in advance, and usually the values of the two are different.
  • the eAN After receiving the connection request message sent by the terminal, the eAN determines, according to the UATI (Unicast Access Terminal Identifier) of the terminal carried in the message, the subnet identifier (ie, the color) in the UATI. Code, Color Code) Is it the identity of the device? If yes, it is determined that the UATI update is not required. Otherwise, it is determined that the terminal does not update the UATI in time.
  • the subnet identifier in the UATI is the identifier of the source subnet where the terminal is located, and the current terminal is located.
  • the subnet is the target subnet of the terminal, so a UATI update is required, and the source of the terminal is determined according to the subnet identifier in the UATI.
  • the eAN that is, the S-eAN in the figure, obtains the air interface session information of the terminal from the S-eAN. Specifically, the standard A13 session migration process is performed to obtain the eHRPD air interface session information from the S-eAN. In FIG. 4, the result of the determination is no.
  • the eAN determines that the UATI update is not required, the eA sends a TCA (Traffic Channel Assignment) to the terminal to establish a traffic channel for the terminal; if the eAN determines that the UATI update is required, the UATI assignment is sent to the terminal.
  • TCA Traffic Channel Assignment
  • UATI Assignment and TCA update the UATI of the terminal, and establish a traffic channel for the terminal.
  • the UATI consists of two parts, a subnet identifier and a terminal identifier.
  • the subnet identifier is used to identify different subnets. Each subnet identifier uniquely corresponds to one subnet and the eAN of the subnet.
  • the terminal identifier is on the subnet. The only one that is valid is used to identify the terminal within the subnet.
  • the terminal If the terminal receives the TCA, it returns a TCC (Traffic Channel Complete message) to the eAN, indicating that the service channel is successfully established. If the terminal receives the UATI assignment message and the TCA, the terminal returns a UATI assignment completion message ( UATI Assignment Complete) and P TCC, indicating that the UATI update is completed and the service channel is successfully established.
  • TCC Traffic Channel Complete message
  • the eAN sends an All-Registration Request message to the HSGW, where the message includes an Active-Start charging record, indicating that the terminal has accessed the eHRPD network.
  • the HSGW After receiving the Al l registration request message, the HSGW determines whether the message includes an Active-Start charging record. If yes, the HSGW has established a traffic channel for the terminal, and the HSGW sends a proxy mobile IP binding update to the P-GW. Message (PMIP Binding Update), establish a proxy mobile IP tunnel.
  • the P-GW interacts with the PCRF, reports an event of a RAT (Radio Access Type) change, initiates an IP-CAN session modification process, and updates an IP-CAN session.
  • a RAT Radio Access Type
  • the P-GW returns a proxy mobile IP binding acknowledgement message (PMIP Binding Ack). This step can also be performed after 406.
  • the HSGW returns an Al-Registration Reply message to the eAN, and the proxy mobile IP tunnel is established, and the handover of the terminal to the eHRPD network is completed. This step may also be performed after 405.
  • the HSGW uses the RSVP (Resource Reservation Protocol) protocol to notify the terminal to establish a corresponding QoS flow.
  • RSVP Resource Reservation Protocol
  • 410 and 411 can also be performed in parallel, and the dedicated QoS flow belonging to a certain PDN should wait for the corresponding PDN connection.
  • the dedicated QoS flow fails to be established, the PCRF is notified to delete the corresponding QoS flow.
  • the P-GW sends a Binding Revocation Indication to the S-GW, and triggers release of resources on the LTE side.
  • the eHRPD air interface session maintenance may be performed, including the air interface session keep-alive and the subnet change processing.
  • the air interface session preservation process may specifically include:
  • the eAN sends a keepalive request message (KeepAliveRequest) to the terminal, and performs eHRPD air interface session detection.
  • the terminal After receiving the keep-alive request message, the terminal determines whether the currently received system broadcast message on the LTE network side indicates that the device is allowed to register to the eHRPD network, and if the pre-registration field (PreRegistrationAllowed) is “allowed”, if yes, Then, the eHRPD air interface session keep-alive processing is performed. Otherwise, the eHRPD session keep-alive processing is not performed. In this case, if the eAN detects that the preset keep-alive timeout period expires, the eHRPD air interface session is deleted, and the registration state is exited.
  • KeepAliveRequest keepalive request message
  • the terminal performs the eHRPD air interface session keep-alive processing, which may include:
  • the dual-issue dual-receiving terminal performs air interface session preservation processing on the eHRPD network; if the terminal is a single-transmitting dual-receiving terminal, the single-transmitting dual-receiving terminal determines its own state, if it is LTE If the state is idle, the device switches to eHRPD mode for air interface session keep-alive processing. If it is in the LTE active state, it determines whether the preset keep-alive timeout period is reached. If yes, it switches to eHRPD mode for air interface session keep-alive processing. Otherwise, The identifier is set to indicate that when the single-transmitting and dual-receiving terminal enters the LTE idle state, the air interface session keep-alive processing is performed.
  • the preset keep-alive timeout period can be set to different values according to requirements, such as preset 18 hours as the keep-alive timeout period. Further, the number of keepalive timeouts may be preset. For example, when the preset keep-alive timeout reaches 3 times, the air interface session is deleted. When the single-issue dual-receiving terminal is in the LTE active state, if the keep-alive timeout reaches the third time, Then immediately switch to eHRPD mode for air interface session keep-alive processing.
  • the terminal returns a keepalive response message (KeepAliveResponse) to the eAN, and the eAN continues to retain the existing air interface session information.
  • KeepAliveResponse keepalive response message
  • the terminal closes the eHRPD transmitter and switches to LTE mode, that is, to the LTE network.
  • the terminal can maintain the air interface session through the air interface session to ensure that the air interface session information is not lost, so as to avoid renegotiating the air interface session when the handover is performed, so as to reduce the handover terminal time.
  • the subnet change processing may also be performed, including: 601: The terminal resides in the LTE network after completing the registration of the eHRPD network.
  • 602 The eAN periodically broadcasts a quick configuration and sector parameter message (QuickConfig & SectorParameters).
  • 603 After receiving the fast configuration and sector parameter message, the terminal determines whether the subnet in the eHRPD network changes according to the content of the fast configuration and the sector parameter message. If the subnet changes, the terminal has moved from the source subnet to If the target subnet is used, it is determined whether the currently received system broadcast message on the LTE network side is allowed to be registered to the eHRPD network. If yes, the UATI update is performed when the terminal is in the LTE idle state, or the terminal is in the LTE active state. When the UATI update is not performed, the UATI update is performed after the terminal enters the LTE idle state. If the terminal remains in the LTE active state until switching to the eHRPD network, the UATI update is performed while the terminal is switched.
  • the UATI update is performed after switching to the eHRPD mode. If the terminal is a dual-issue dual-receiving terminal, the UATI update is performed directly on the eHRPD network.
  • the terminal performs a UATI assignment process, and acquires a new UATI from the T-eAN/PCF of the target subnet. If the source subnet and the target subnet belong to the same eAN, the eAN re-assigns a UATI to the terminal; The network and the target subnet belong to different eANs, and the T-eAN/PCF of the target subnet performs an A13 session to migrate the eHRPD air interface session information from the S-eAN/PCF of the source subnet, and allocates a new UATI, and then transmits the new UATI to the terminal.
  • the eHRPD transmitter is turned off and tuned to the LTE network. If the terminal is a dual-issue dual-receiving terminal, this step is not performed.
  • the terminal can be updated by the subnet to ensure that the UATI is updated, and the eHRPD air interface session information is migrated from the source S-eAN/PCF, so that the negotiated air interface session information is lost, so that the air interface session is not renegotiated during the handover execution. Switch the interruption time.
  • the terminal can also perform PPP session maintenance, as follows:
  • the terminal When the terminal receives the PPP session detection message sent by the HSGW, if the terminal is in the LTE network, the terminal does not respond to the PPP session detection message.
  • the eAN air interface session keepalive detection timeout expires, the eHRPD air interface session is released.
  • the eAN/PCF initiates the release of the primary A10 connection, thereby triggering the HSGW to release the PPP session.
  • the HSGW treats all users as Always-on users (that is, always online), and the HSGW does not implement PPP Session timer session timing.
  • the default value of the PPP inactivity timer in the HSGW is 0. That is, the PPP inactivity period is infinite.
  • the HSGW does not initiate PPP session detection.
  • the PPP inactivity period uses the default value of 0.
  • the HSGW sends an LCP Echo Request message to the terminal for PPP session detection when the inactive period reaches the specified time.
  • the terminal After receiving the PPP session detection message, the terminal does not return an LCP Echo Reply response message if the terminal is currently camped on the LTE network, so that the HSGW releases the PPP session and reestablishes the PPP when the terminal switches to the eHRPD network next time.
  • the PPP session maintenance of the terminal does not respond to the PPP session detection of the HSGW.
  • the PPP session is prevented from responding to the PPP session, so that the service channel is established for the terminal, so that the network side identifies the terminal that has been switched to the eHRPD network, thereby generating an unnecessary LTE network to the eHRPD network. Switching.
  • the terminal may use the unreleased eHRPD air interface if the terminal meets the condition for switching to the eHRPD network before the eHRPD air interface connection is released.
  • the connection execution switching process as shown in FIG. 7, may specifically include:
  • the terminal completes the registration from the LTE network to the eHRPD network, and detects that the terminal meets the condition for switching to the eHRPD network before releasing the eHRPD air interface connection, and sends a VSNCP configuration request message VSNCP Config-Req to the HSGW, and the attachment type in the message
  • the field is set to "Handover Attach", which triggers the establishment of the proxy mobile IP tunnel.
  • the HSGW After receiving the VSNCP configuration request message, the HSGW does not need to re-establish the eHRPD air interface connection, and the UATI updates and establishes the traffic channel, directly establishes the proxy mobile IP tunnel, and completes the terminal by using the proxy mobile IP tunnel. Switch to the eHRPD network.
  • the HSGW establishes a proxy mobile IP tunnel and the handover process of the terminal to the eHRPD network, which is the same as 406 to 412 in the embodiment of the present invention, and is not described herein.
  • the method of the embodiment of the present invention can adjust the sequence of each step according to actual needs.
  • the foregoing method provided by the embodiment of the present invention performs registration by using an eHRPD air interface before the terminal switches to the eHRPD network, and completes the eHRPD air interface session negotiation, PPP negotiation, and EAP-AKA authentication before the handover of the LTE to eHRPD occurs. Only the eHRPD air interface connection and the proxy mobile IP tunnel switching are established, which greatly reduces the service interruption time of the LTE network to the eHRPD network handover. Compared with the existing optimized handover, it is not completed by LTE and S101 tunnels, which greatly reduces the complexity of the network. Moreover, there is no need to modify the protocol stack of the terminal, which reduces the complexity of the terminal.
  • the terminal performs the air interface session keep-alive and subnet change processing as needed in the LTE idle state, which ensures that the terminal does not exit the eHRPD registration state, ensuring the validity of the eHRPD registration.
  • the embodiment of the present invention further provides a network switching method, which may specifically include:
  • the LTE network sends a message to the terminal, indicating that the terminal is allowed to register the eHRPD network.
  • the eHRPD network side establishes a proxy mobile IP tunnel, and the proxy mobile IP tunnel completes the handover of the terminal to the eHRPD network.
  • the above method may further include:
  • the HSGW of the eHRPD network receives the device extension network control protocol VSNCP configuration request message sent by the terminal, and the HSGW determines whether the attachment type field carried in the configuration request message is a registration, and if yes, The HSGW does not establish a proxy mobile IP tunnel to the packet data network gateway during the registration process.
  • the above method may further include:
  • the eAN of the eHRPD network side After the terminal completes the registration to the eHRPD network, the eAN of the eHRPD network side sends an air interface session keep-alive request message to the terminal; and the eAN receives the air interface session keep-alive response message returned by the terminal according to the indication of the LTE network side and its own state.
  • the above method may further include:
  • the eAN of the target subnet where the terminal is currently located determines whether it is the eAN of the source subnet where the terminal is located before the subnet change. Then, the eAN allocates an access terminal unicast identity UATI to the terminal. Otherwise, the eAN of the target subnet migrates the eHRPD air interface session information from the eAN of the source subnet, and allocates a new UATI to the terminal, and then sends the terminal to the terminal.
  • the method may further include:
  • the eAN of the eHRPD network side receives a connection request message sent by the terminal in the eHRPD network;
  • the eAN determines, according to the connection request message, whether the subnet identifier in the unicast identifier of the access terminal of the terminal is its own identifier; if yes, the eAN sends a traffic channel assignment message to the terminal to establish a service channel for the terminal;
  • the eAN determines the source eAN of the terminal according to the subnet identifier in the unicast identifier of the access terminal, and obtains the air interface session information of the terminal from the source eAN, and then sends the access terminal unicast identifier assignment message and the service channel assignment to the terminal.
  • the message updates the access terminal unicast identity of the terminal and establishes a traffic channel for the terminal.
  • the method of the embodiment of the present invention can adjust the sequence of each step according to actual needs.
  • the foregoing method provided by the embodiment of the present invention performs registration by using an eHRPD air interface before the terminal switches to the eHRPD network, and completes the eHRPD air interface session negotiation, PPP negotiation, and EAP-AKA authentication before the handover of the LTE to eHRPD occurs. Only the eHRPD air interface connection and the proxy mobile IP tunnel switching are established, which greatly reduces the service interruption time of the LTE network to the eHRPD network handover. Compared with the existing optimized handover, it is not completed by LTE and S101 tunnels, which greatly reduces the complexity of the network. Moreover, there is no need to modify the protocol stack of the terminal, which reduces the complexity of the terminal.
  • an embodiment of the present invention further provides a terminal, which may include:
  • the registration module 901 is configured to: when the terminal camps on the LTE network, perform registration of the eHRPD network through the eHRPD air interface according to the indication of the LTE network;
  • the triggering module 902 is configured to: when the registration module 901 completes registration and the terminal decides to switch to the eHRPD network, establish an air interface connection, and trigger the eHRPD network to establish a proxy mobile IP tunnel from the HSGW to the P-GW, where the proxy mobile IP tunnel is used to complete The handover of the terminal from the LTE network to the eHRPD network.
  • the registration module 901 may specifically include:
  • a first registration unit configured to: if the single-issue dual-receiver terminal residing in the LTE network receives the system broadcast message on the LTE network side, and the system broadcast message indicates that the registration is allowed to be registered to the eHRPD network, In the LTE idle state, the eHRPD mode is switched to the eHRPD mode to register the eHRPD network.
  • the registration module 901 may specifically include:
  • a second registration unit configured to: if the dual-issue dual-receiver terminal residing in the LTE network receives the system broadcast message on the LTE network side, and the system broadcast message indicates that the registration is allowed to be registered to the eHRPD network, In the LTE idle state or the LTE active state, the eHRPD network is registered through the eHRPD air interface.
  • the foregoing terminal may further include:
  • connection establishment module configured to send a device extension network control protocol VSNCP configuration request message to the eHRPD network side during the registration process of the eHRPD network, requesting to establish a packet data network connection, and the attachment type field carried in the configuration request message
  • VSNCP configuration request message When the content is registered, it indicates that the HSGW in the eHRPD network does not need to establish a proxy mobile IP tunnel from the HSGW to the P-GW in the registration process.
  • the method may further include:
  • the first air interface session keep-alive module is configured to: when the dual-issue dual-receiving terminal performs the registration of the eHRPD network, when the dual-issue dual-receiving terminal receives the air interface session keep-alive request message sent by the evolved access network eAN, If the dual-receiver terminal currently receives the system broadcast message on the LTE network side and indicates that the device is allowed to register to the eHRPD network, the dual-issue and dual-receiving terminal performs the air interface session keep-alive processing;
  • the method may further include:
  • the second air interface session keep-alive module is configured to: when the single-issue dual-receiving terminal receives the air interface session keep-alive request message sent by the e-AN after the single-issue dual-receiving terminal performs the registration of the eHRPD network, if the single-issue dual-receiving terminal receives the current
  • the single-issue dual-receiver terminal determines its own state, if In the LTE idle state, the air interface session keep-alive processing is performed. If it is in the LTE active state, it is determined whether the preset keep-alive timeout period is reached. If yes, the air interface session keep-alive processing is performed. Otherwise, the identifier is set to indicate that the single-issue is issued.
  • the dual-receiver terminal enters the LTE idle state the air interface session keep-alive processing is performed.
  • the foregoing terminal may further include:
  • the subnet change processing module is configured to: when the terminal performs the registration of the eHRPD network, when the terminal detects that the subnet in the eHRPD network changes, if the terminal currently receives the system broadcast message on the LTE network side, the indication is allowed to be registered.
  • the eHRPD network performs the unicast identity update of the access terminal when the terminal is in the LTE idle state, or performs the unicast identity update of the access terminal in the process of switching to the eHRPD network when the terminal is in the LTE active state.
  • the foregoing terminal may further include:
  • the peer-to-peer session maintenance module is configured to: when the terminal receives the peer-to-peer session detection message sent by the high-rate packet data service gateway, if the terminal is in the LTE network, the peer-to-peer session detection message is not responded.
  • the modules of the embodiments of the present invention may be integrated into one or may be deployed separately.
  • the above modules can be combined into one module, or they can be further split into multiple sub-modules.
  • the foregoing terminal performs registration by using an eHRPD air interface before switching to the eHRPD network, and completes eHRPD air interface session negotiation, PPP negotiation, and EAP-AKA authentication before the handover of LTE to eHRPD occurs. Only the eHRPD air interface connection and the proxy mobile IP tunnel switching are established, which greatly reduces the service interruption time of the LTE network to the eHRPD network handover. Compared with the existing optimized handover, it is not completed by LTE and S101 tunnels, which greatly reduces the complexity of the network. Moreover, there is no need to modify the protocol stack of the terminal, which reduces the complexity of the terminal.
  • an embodiment of the present invention further provides a base station, which is located in an LTE network, and may include:
  • the message generating module 1001 is configured to generate a message, which is used to enable the terminal to perform registration of the eHRPD network.
  • the sending module 1002 is configured to send a message generated by the message generating module 1001 to the terminal residing in the LTE network, to indicate that the terminal is allowed to perform the eHRPD network. Registration, so that the terminal can register the eHRPD network through the eHRPD air interface.
  • the foregoing base station allows the terminal to perform registration of the eHRPD network by instructing the terminal, so that the terminal can complete registration to the eHRPD network before the handover of the LTE network to the eHRPD network occurs, which greatly reduces Service interruption time from LTE network to eHRPD network handover.
  • the embodiment of the present invention further provides a gateway, which is located in the eHRPD network, and may include:
  • the tunnel establishment module is configured to: when the terminal completes registration from the LTE network to the eHRPD network and decides to switch to the eHRPD network, establish a proxy mobile IP tunnel, and complete the handover of the terminal to the eHRPD network by using the proxy mobile IP tunnel.
  • the foregoing gateway may further include:
  • the receiving module 1101 is configured to receive, by the terminal, a device extension network control protocol VSNCP configuration request message sent by the terminal during the registration process of the eHRPD network;
  • the tunnel establishment module 1102 is specifically configured to determine whether the content of the attachment type field carried in the VSNCP configuration request message received by the receiving module 1101 is a registration, and if yes, the packet data network gateway P is not established in the registration process.
  • - GW's proxy mobile IP tunnel when the terminal completes registration from the LTE network to the eHRPD network and decides to switch to the eHRPD network, establishes a proxy mobile IP tunnel to the P-GW, and the proxy mobile IP tunnel completes the handover of the terminal to the eHRPD network. Otherwise, the corresponding processing is performed according to the content of the attachment type field.
  • an embodiment of the present invention does not establish a proxy mobile IP tunnel when the field is registered, and the proxy mobile IP tunnel is not established when the terminal performs eHRPD network registration, so that the terminal is switched to When the eHRPD network is used, the service interruption time of the handover is greatly shortened.
  • an embodiment of the present invention further provides an eAN, which is located in an eHRPD network, and the eAN may include at least one of the following three modules:
  • the air interface session keep-alive module 1201 is configured to: after the terminal completes registration from the long-term evolution LTE network to the eHRPD network, send an air interface session keep-alive request message to the terminal, and receive the air interface that the terminal returns according to the indication of the LTE network side and the status of the LTE network. Session keep-alive response message;
  • the subnet change processing module 1202 is configured to: when the terminal completes the registration from the LTE network to the eHRPD network, and detects that the subnet in the eHRPD network changes, the eAN that is the target subnet where the terminal is currently located determines whether the subnet is a subnet.
  • the eAN of the source subnet where the terminal is located before the change if yes, assign an access terminal unicast identity UATI to the terminal; otherwise, migrate the eHRPD air interface session information from the eAN of the source subnet, and assign a UATI to the terminal, and then send Give the end
  • the service channel establishing module 1203 is configured to receive a connection request message sent by the terminal in the eHRPD network after the decision is handed over to the eHRPD network, and determine, according to the connection request message, whether the subnet identifier in the unicast identifier UATI of the access terminal of the terminal is an eAN.
  • Identification if yes, sending a traffic channel assignment message to the terminal to establish a traffic channel for the terminal; otherwise, Determining the source eAN of the terminal according to the subnet identifier in the UATI, and obtaining the air interface session information of the terminal from the source eA, and then sending the access terminal unicast identifier assignment message and the traffic channel assignment message to the terminal, updating the UATI of the terminal, and Establish a traffic channel for the terminal.
  • FIG. 12 is an example in which the eAN includes the above three modules. In practical applications, the eAN may include only one or any two of the above three modules.
  • an embodiment of the present invention can ensure that the terminal does not exit the eHRPD registration state by performing the air interface session keep-alive processing and the subnet change processing, and ensures the validity of the eHRPD registration;
  • the eHRPD air interface session negotiation is not required, and the terminal does not require the subnet change processing to be performed immediately when the LTE active state detects the eHRPD network subnet change.
  • a network system which may include:
  • the terminal 1301 is configured to: when the LTE network resides on the LTE network, perform registration of the eHRPD network through the eHRPD air interface according to the indication of the LTE network, and then establish an air interface connection, and trigger the eHRPD network to establish a proxy mobile IP tunnel from the HSGW to the P-GW.
  • the proxy mobile IP tunnel is used to complete the handover of the terminal from the LET network to the eHRPD network;
  • the base station 1302 is located in the LTE network, and is configured to send a message to the terminal when the terminal camps on the LTE network, to indicate that the terminal is allowed to register the eHRPD network, and specifically, the base station may be an eNodeB;
  • the high-rate packet data serving gateway HSGW 1303 is located in the eHRPD network, and is used to establish a proxy mobile IP tunnel to the P-GW when the terminal completes registration from the LTE network to the eHRPD network and decides to switch to the eHRPD network, and moves the IP through the proxy.
  • the tunnel completes the handover of the terminal to the eHRPD network.
  • the foregoing system may further include: an eAN located in the eHRPD network, where the eAN includes at least one of the following three modules:
  • the air interface session keep-alive module is configured to: after the terminal completes the registration from the LTE network to the eHRPD network, send an air interface session keep-alive request message to the terminal, and receive the air interface session returning by the terminal according to the indication of the LTE network side and the status of the terminal Response message
  • the subnet change processing module is configured to: when the terminal completes the registration from the LTE network to the eHRPD network, and detects that the subnet in the eHRPD network changes, the eAN that is the target subnet where the terminal is currently located determines whether the subnet is changed by the subnet.
  • the eAN of the source subnet where the front terminal is located if yes, assign an access terminal unicast identity UATI to the terminal; otherwise, migrate the eHRPD air interface session information from the eAN of the source subnet, and assign a UATI to the terminal, and then send it to the terminal.
  • a service channel establishing module configured to be sent by the receiving terminal in the eHRPD network after the decision is handed over to the eHRPD network.
  • a connection request message determining, according to the connection request message, whether the subnet identifier in the terminal unicast identifier UATI of the terminal is an identifier of the eAN, and if yes, sending a service channel assignment message to the terminal, establishing a traffic channel for the terminal, otherwise, Determining the source eAN of the terminal according to the subnet identifier in the UATI, and acquiring the air interface session information of the terminal from the source eAN, and then sending the access terminal unicast identifier assignment message and the service channel assignment message to the terminal, updating the UATI of the terminal, and Establish a traffic channel for the terminal.
  • the various units of the system of the embodiments of the present invention may be integrated into one device or may be distributed to multiple devices.
  • the above units may be combined into one unit, or may be further split into a plurality of subunits.
  • the foregoing system performs eHRPD air interface session negotiation, PPP negotiation, and EAP-AKA authentication before the terminal switches to the eHRPD network, before the handover of the LTE network to the eHRPD network occurs.
  • Only the eHRPD air interface connection and the proxy mobile IP tunnel switching are established during the handover, which greatly reduces the service interruption time of the LTE network to the eHRPD network handover.
  • LTE and S101 tunnels which greatly reduces the complexity of the network.
  • there is no need to modify the protocol stack of the terminal which reduces the complexity of the terminal.
  • the terminal performs the air interface session keep-alive and the subnet change processing as needed in the LTE idle state, which ensures that the terminal does not exit the eHRPD registration state, and ensures the validity of the eHRPD registration.
  • the present invention can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware, or a combination of the two.
  • the technical solution of the present invention may be embodied in the form of a software product in essence or in the form of a software product, which may be stored in a storage medium, including several instructions.
  • a computer device which may be a personal computer, server, or network device, etc.
  • the storage medium may be a random access memory (RAM), a memory, a read only memory (ROM), an electrically programmable ROM, an electrically erasable programmable ROM, a register, a hard disk, a removable disk, a CD-ROM, or is known in the art. Any other form of storage medium.

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

Abstract

La présente invention concerne, selon des modes de réalisation, un procédé, un équipement utilisateur (UE), une passerelle et un système de réseau pour transfert de réseau. Ledit procédé comprend les étapes suivantes : le côté réseau à évolution à long terme (LTE) envoie à l'UE un message indiquant que ce dernier a été autorisé à être enregistré dans le réseau eHRPD (« evolved high rate packet data ») ; lorsque l'UE a été enregistré dans le réseau eHRPD via l'interface radio eHRPD, le côté réseau eHRPD établit un tunnel IP mobile de serveur mandataire par lequel l'UE est transféré au réseau eHRPD. L'UE comprend un module d'enregistrement et un module de déclenchement. La passerelle comporte un module de réception et un module d'établissement de tunnel. Le système comprend un UE, une station de base et une passerelle de desserte HRPD (HSGW). Les modes de réalisation de la présente invention permettent de diminuer le temps d'interruption de transfert et de réduire la complexité du réseau et de l'UE.
PCT/CN2009/070085 2009-01-08 2009-01-08 Procédé de transfert de réseau, équipement utilisateur, passerelle et système de réseau afférent Ceased WO2010078725A1 (fr)

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CN200980150126.4A CN102177748B (zh) 2009-01-08 2009-01-08 一种网络切换方法、终端、网关和网络系统

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CN105704764A (zh) * 2014-11-26 2016-06-22 中兴通讯股份有限公司 一种网络切换方法及网络系统
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CN106454977B (zh) * 2016-10-21 2020-10-27 海能达通信股份有限公司 一种终端的呼叫业务切换方法及装置
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