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WO2011047609A1 - Procédé pour réaliser un pré-enregistrement en vue d'un transfert intercellulaire et système correspondant - Google Patents

Procédé pour réaliser un pré-enregistrement en vue d'un transfert intercellulaire et système correspondant Download PDF

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Publication number
WO2011047609A1
WO2011047609A1 PCT/CN2010/077784 CN2010077784W WO2011047609A1 WO 2011047609 A1 WO2011047609 A1 WO 2011047609A1 CN 2010077784 W CN2010077784 W CN 2010077784W WO 2011047609 A1 WO2011047609 A1 WO 2011047609A1
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WIPO (PCT)
Prior art keywords
pdn connection
registration information
apn
user equipment
registration
Prior art date
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PCT/CN2010/077784
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English (en)
Chinese (zh)
Inventor
毕以峰
周晓云
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ZTE Corp
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ZTE Corp
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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
    • H04W36/0016—Hand-off preparation specially adapted for end-to-end data sessions
    • 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
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0069—Transmission or use of information for re-establishing the radio link in case of dual connectivity, e.g. decoupled uplink/downlink
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/14—Reselecting a network or an air interface
    • H04W36/144—Reselecting a network or an air interface over a different radio air interface technology

Definitions

  • the present invention relates to the field of communications, and in particular, to a method and system for implementing handover pre-registration in a handover scenario.
  • the interconnection and interworking of the eHRPD (evolved high rate packet data) network that is, the user equipment (User Equipment, UE for short) can access the EPS P-GW through eHRPD. And can achieve the UE switching back and forth between the two systems, the eHRPD system architecture is shown in the lower part of the dotted line in Figure 1.
  • eHRPD evolved high rate packet data
  • FIG. 1 shows a schematic diagram of the interconnection architecture of the E-UTRAN/EPS and eHRPD systems.
  • the eHRPD system is composed of an HSGW (HRPD Serving Gateway, a high-rate packet data service gateway), HRPD-eAN (evolved access network), P-GW as the data anchor gateway (that is, P-GW in 3GPP EPS, in the interconnection scenario, the EPS system and the eHRPD system share the P-GW) Such as basic network elements.
  • the HSGW is an access gateway device connected to the HRPD-eAN, responsible for user mobility management, context management, and forwarding data between the HRPD-eAN and the P-GW, responsible for Paging waits for data to be cached and forwarded, and so on.
  • the P-GW is a data gateway that the terminal accesses the PDN through a 3GPP access network (such as E-UTRAN) and a non-3GPP access network (such as eHRPD), that is, whether the terminal UE accesses through the E-UTRAN access network or Through the eHRPD access network access, the uplink and downlink data transmission must pass through the data gateway P-GW and then communicate with the external PDN; when the terminal switches between 3GPP access (such as E-UTRAN) and non-3GPP access (such as eHRPD) When the P-GW acts as a gateway that does not change, it is an anchor point in the handover process.
  • a 3GPP access network such as E-UTRAN
  • eHRPD non-3GPP access network
  • S101 interface In order to implement multi-mode terminal access through different access systems, and to ensure the continuity of the service when the terminal switches in different access systems, some interfaces are added: S101 interface, S103 interface and S2a interface.
  • the S2a interface transmits control signaling and service data between the HSGW and the P-GW, and uses the PMIPv6 protocol.
  • the S103 interface is used to forward the downlink data when the terminal is switched from the E-UTRAN system to the eHRPD system, and the forwarded downlink data is buffered in the HSGW.
  • the step of the UE optimizing the handover from the E-UTRAN access system to the eHRPD access system is divided into two phases:
  • the UE detects that the current E-UTRAN radio signal starts to become weak, and the eHRPD radio signal is good.
  • the UE prepares the eHRPD system for pre-registration before the official handover to the eHRPD, because the UE is a single-standby terminal (ie, UE). Multiple radio transmissions and receptions cannot be enabled at the same time.
  • the eHRPD signaling in the pre-registration phase is transmitted to the HRPD-eAN and HSGW through the wireless signal encapsulated by the E-UTRAN and the S101 interface (for details, see the analysis of the existing processes).
  • the UE After the pre-registration preparation is completed, the UE does not necessarily switch to the eHRPD system immediately. As long as the E-UTRAN wireless signal can support the current service, the UE does not switch, and thus the UE pre-registration information in the eHRPD needs to be maintained. Second stage, switching
  • the UE detects that the current E-UTRAN signal cannot support the current service, and then officially switches to the eHRPD system. Since the UE has pre-registration information in the eHRPD system, it is quick and convenient for the UE to switch to the eHRPD system.
  • Figure 2 shows the process of optimizing handover of an existing UE from an E-UTRAN access system to an eHRPD access system, including:
  • the UE accesses the EPC through the E-UTRAN and is in an Active state;
  • the UE detects that the current E-UTRAN radio signal is weak by measuring the radio signal, and the eHRPD radio signal is good, and decides to initiate pre-registration to the eHRPD system;
  • the UE establishes an eHRPD session with the HRPD-eAN;
  • a data channel is established between the HRPD-eAN and the HSGW.
  • an A10 connection is established through Al l signaling;
  • the UE accesses the authentication and authorization of the eHRPD system
  • the PDN connection information, the network layer negotiation of the PPP (Point to Point Protocol) session, the resource reservation and the bearer establishment are negotiated between the UE and the HSGW;
  • the UE does not necessarily switch to the eHRPD system immediately. As long as the E-UTRAN wireless signal can support the current service, the UE does not switch, so that before the official handover, the UE is in the UE.
  • the pre-registration information of the eHRPD needs to be maintained;
  • the time interval between the completion of the pre-registration and the formal handover by the UE is uncertain, so the refresh and maintenance duration of the pre-registration information is also indefinite.
  • the UE detects that the E-UTRAN signal is insufficient to support the current service, the UE officially switches from E-UTRAN to eHRPD.
  • This step 208 belongs to the second phase of the handover.
  • the specific detailed operation is not discussed in detail because it has little relationship with the present invention.
  • the eHRPD session establishment signaling between the UE and the HRPD-eAN, the authentication and authorization signaling between the UE and the HSGW, and the setup signaling of the PDN connection and the maintenance refresh of the pre-registration information are all through the eNB and the MME. Forwarding, carried by the E-UTRAN radio signal between the UE and the eNB, the signaling between the eNB and the MME, and the S101 signaling between the MME and the HRPD-eAN.
  • Single APN multi-PDN connection technology is a new feature of the new version of the 3GPP E-UTRAN system R9, it is R8 in the 3GPP E-UTRAN system Enhancements on the version.
  • the 3GPP E-UTRAN R8 version supports that a terminal can access multiple PDNs through different APNs, establish multiple PDN connections, and access different PDNs. However, the terminal cannot access the same PDN multiple times through the same APN.
  • the APN establishes multiple PDN connections.
  • This feature has been enhanced in the R9 version of the 3GPP E-UTRAN system, that is, the same APN can be accessed to the same PDN multiple times, multiple PDN links can be established through the same APN, and a PDN connection cannot be identified through the APN alone.
  • an APN+ linked bearer ID (LBI, linked bearer ID) is used to identify a PDN connection.
  • the current standard protocol stipulates that if the UE establishes multiple PDN connections for an APN in an E-UTRAN system supporting a single APN multi-PDN connection, if the UE switches to non-3GPP, and the non-3GPP is an unsupported list APN multi-PDN connection technology system, so that only one PDN connection under the APN can be switched to the target eHRPD system, and the latest one, that is, the last established PDN connection, the remaining PDN connections will be discarded. .
  • the technical problem to be solved by the present invention is to provide a method and system for implementing handover pre-registration.
  • the UE Under the E-UTRAN-eHRPD interconnection and interworking architecture, the UE does not support a single APN from an E-UTRAN system supporting a single APN multi-PDN connection. Multi-PDN connection technology for eHRPD system switching Pre-registration.
  • the present invention provides a method for implementing handover pre-registration, including: when a user equipment performs handover pre-registration from a source system to a target system, if the target system does not support the existence of the same access point name (APN)
  • a plurality of packet data network (PDN) connections establish pre-registration information only for the newly established PDN connection among all PDN connections under the APN.
  • PDN packet data network
  • the foregoing method may also have the following feature: after the user equipment establishes the pre-registration information, if the user equipment establishes a new PDN connection under the APN from the source system, or the user equipment deletes the newly established PDN connection under the APN from the source system, Pre-registration information is established for the newly established PDN connection in the currently existing PDN connection under the APN.
  • the foregoing method may further include the following steps: the step of the user equipment establishing pre-registration information for the newly established PDN connection in the currently existing PDN connection under the APN includes:
  • the user equipment After releasing the pre-registration information of the original PDN connection, the user equipment initiates a PDN connection pre-registration information establishment operation, and negotiates with the target system to establish pre-registration information for the newly established PDN connection in the currently existing PDN connection under the APN.
  • the foregoing method may further have the following feature: the step of the user equipment releasing the pre-registration information of the original PDN connection comprises: the user equipment sending a device vendor defined network control protocol (VSNCP) termination request signaling to the high rate packet data serving gateway (HSGW), the HSGW The user equipment and the HSGW are released with the pre-registration information of the original PDN connection.
  • VSNCP device vendor defined network control protocol
  • HSGW high rate packet data serving gateway
  • the foregoing method may further include the following steps: the user equipment initiates a PDN connection pre-registration information establishment operation, and the step of establishing pre-registration information for the newly established PDN connection in the currently existing PDN connection under the APN includes: the user equipment and the high-rate packet data service gateway (HSGW) Mutually send device vendor defined network control protocol (VSNCP) configuration request/acknowledgement signaling to establish pre-registration information of the newly established PDN connection.
  • HSGW high-rate packet data service gateway
  • VSNCP device vendor defined network control protocol
  • the foregoing method may further include the following steps: the step of the user equipment establishing pre-registration information for the newly established PDN connection in the currently existing PDN connection under the APN includes:
  • the user equipment initiates a PDN connection pre-registration information establishment operation, and negotiates with the target system to modify the pre-registration information of the original PDN connection, or overwrites the pre-registration information of the original PDN connection with the newly established pre-registration information, so that the current existence exists under the APN.
  • the newly established PDN connection in the PDN connection Establish pre-registration information.
  • the foregoing method may also have the following features: the user equipment initiates a PDN connection pre-registration information establishment operation, and the step of overwriting the pre-registration information of the original PDN connection by modifying/updating the pre-registration information of the original PDN connection or creating new pre-registration information includes: The device and the High Rate Packet Data Serving Gateway (HSGW) mutually send Device Provider Definition Network Control Protocol (VSNCP) configuration request/acknowledgement signaling, modify/update/overwrite the pre-registration information of the original PDN connection.
  • HSGW High Rate Packet Data Serving Gateway
  • VSNCP Device Provider Definition Network Control Protocol
  • the foregoing method may also have the following feature: after the target system establishes pre-registration information for the newly established PDN connection in the PDN connection currently existing in the APN, the target system returns a message to the user equipment, where the message carries the newly established pre-registration information has been modified/ Overwrites the indication of pre-registration information established for the original PDN connection.
  • the pre-registration information includes any combination of the following information:
  • the present invention also provides a system for implementing handover pre-registration, comprising: a user equipment, a source system, and a target system, where:
  • the user equipment is configured to perform pre-registration of the PDN connection from the source system to the target system, if the target system does not support multiple PDN connections in the same APN, only the pre-registration of the newly established PDN connection in all PDN connections under the APN is established. information.
  • the user equipment is further configured to establish the pre-registration information, in the maintenance phase of the pre-registration information, if the user equipment establishes a new PDN connection under the APN from the source system, or the user equipment deletes the newly established APN from the source system.
  • the PDN connection establishes pre-registration information for the newly established PDN connection in the currently existing PDN connection under the APN.
  • the user equipment is further configured to release the pre-registration information of the original PDN connection, initiate a PDN connection pre-registration information establishment operation, and establish pre-registration information for the newly established PDN connection in the currently existing PDN connection under the APN.
  • the user equipment is also set to send equipment agreement to the High Rate Packet Data Serving Gateway (HSGW)
  • HSGW High Rate Packet Data Serving Gateway
  • VSNCP network control protocol
  • the user equipment is also arranged to transmit Device Provider Defined Network Control Protocol (VSNCP) configuration request/acknowledgement signaling to the High Rate Packet Data Serving Gateway (HSGW) to establish pre-registration information for the newly established PDN connection.
  • VSNCP Device Provider Defined Network Control Protocol
  • HSGW High Rate Packet Data Serving Gateway
  • the user equipment is further configured to initiate a PDN connection pre-registration information establishment operation, by modifying/updating the pre-registration information of the original PDN connection, or newly establishing the pre-registration information to overwrite the pre-registration information of the original PDN connection, which is the PDN currently existing under the APN.
  • Pre-registration information is established by the newly established PDN connection in the connection.
  • the user equipment is further arranged to mutually transmit a Subscriber Defined Network Control Protocol (VSNCP) configuration request/acknowledgement signal to the High Rate Packet Data Serving Gateway (HSGW) to modify/update/overwrite the pre-registration information of the original PDN connection.
  • VSNCP Subscriber Defined Network Control Protocol
  • HSGW High Rate Packet Data Serving Gateway
  • the target system is configured to: after establishing pre-registration information for the newly established PDN connection in the currently existing PDN connection of the APN, return a message to the user equipment, where the message carries the newly established pre-registration information has been modified/overwritten as the original An indication of the pre-registration information established by the PDN connection.
  • the pre-registration information includes any combination of the following information:
  • PDN address APN
  • traffic flow template TFT TFT
  • quality of service QoS information
  • the method and system of the present invention can establish pre-registration information for the newly established PDN connection of the user equipment in multiple PDN connections under the same APN, thereby ensuring that the newly established PDN connection is switched to the target system.
  • FIG. 1 is an architectural diagram of eHRPD-E-UTRAN interconnection according to the related art
  • FIG. 2 is a flowchart of a UE switching from an E-UTRAN to an eHRPD according to the related art
  • FIG. 3 is a flowchart of a method according to an embodiment of the present invention
  • Embodiment 4 is a flow chart of Embodiment 2 of the method according to the present invention.
  • Figure 5 is a flow chart of a third embodiment of the method in accordance with the present invention.
  • a UE Under the E-UTRAN-eHRPD interconnection architecture, a UE establishes multiple PDN connections under an APN in an E-UTRAN access system, when the UE switches from E-UTRAN to eHRPD, If the eHRPD is an access system that does not support a single APN multi-PDN connection, the pre-registration information is established only for the newly established PDN connection of all PDN connections of the UE under the APN.
  • the method for implementing handover pre-registration according to the present invention includes:
  • the UE performs handover pre-registration before switching from the source system to the target system, if the target system does not support multiple packet data network (PDN) connections under the same access point name (APN), only the UE is under the same APN. Pre-registration information is established on the newly established PDN connection in all the PDN connections.
  • the UE has one or more PDN connections under the same APN.
  • the unique PDN connection is Establish pre-registration information.
  • the UE in the maintenance phase of the pre-registration information, if the UE establishes a new PDN connection from the source system under the APN, or the UE deletes the source system from the source system The newly established PDN connection among all PDN connections under the APN, the UE establishes pre-registration information from the target system for the newly established PDN connection in the currently existing PDN connection under the APN.
  • a new pre-registration is established.
  • the original pre-registration information needs to be deleted, and the UE establishes pre-registration information for the newly established PDN connection in the currently existing PDN connection under the APN from the target system, and can be established in any of the following two ways:
  • the UE initiates a pre-registration information release operation through the PDN connection, and negotiates with the target system to release the pre-registration information of the original PDN connection (that is, the PDN connection with the pre-registration information), the UE initiates a PDN connection pre-registration information establishment operation, and negotiates with the target system. Establishing pre-registration information for the newly established PDN connection in the PDN connection currently existing under the APN in the source system;
  • the UE directly initiates a PDN connection pre-registration information establishment operation, negotiates with the target system, and modifies the pre-registration information of the original PDN connection or overwrites the pre-registration information of the original PDN connection by using the newly established pre-registration information, as the source system.
  • the newly established PDN connection in the currently existing PDN connection under the APN establishes pre-registration information.
  • the response message is returned to the UE, and the newly created pre-registration information is modified/overwritten in the response message.
  • FIG. 3 is a flow chart of an embodiment of the method according to the present invention, the detailed steps are described as follows:
  • the UE accesses the EPC through the E-UTRAN and is in an Active state; multiple PDN connections are established for one APN. As a special case, there may be only one PDN connection under the APN.
  • the UE detects that the current E-UTRAN radio signal is weak by measuring the radio signal, and the eHRPD radio signal is very good, and decides to initiate pre-registration to the eHRPD system.
  • the UE establishes an eHRPD session with the HRPD-eAN.
  • a data channel is established between the HRPD-eAN and the HSGW.
  • the A10 connection is established through Al l signaling.
  • the UE accesses the authentication and authorization of the eHRPD system.
  • the UE selects the newly established PDN connection to initiate pre-registration; as a special case, if there is only one PDN connection in the APN, A PDN connection establishes pre-registration information.
  • the PDN connection information is negotiated between the UE and the HSGW, the network layer negotiation of the PPP session, resource reservation and bearer establishment;
  • the UE sends a device-defined network control protocol configuration request (VSNCP-configure-Request) message to the HSGW, and the HSGW responds to the UE with a device-defined network control protocol configuration confirmation (VSNCP-configure-Ack) message.
  • VSNCP-configure-Request device-defined network control protocol configuration request
  • VSNCP-configure-Ack device-defined network control protocol configuration confirmation
  • the HSGW sends a VSNCP-configure-Request message to the UE, and the UE responds to the HSGW with a VSNCP-configure-Ack message.
  • the HSGW may directly occur after the HSGW receives the VSNCP-configure-Request message of the UE, and does not need to wait for the VSNCP-configure-Ack to be sent to the UE, that is, the HSGW.
  • the VSNCP-configure-Request and VSNCP-configure-Ack messages sent to the UE have no necessary relationship.
  • the PDN is connected to the IPv4 address.
  • the UE performs IPv4 address negotiation with the network side through a DHCP (Dynamic Host Configuration Protocol) procedure. If the PDN connection has an IPv6 address, optionally, the UE passes the RS/ The RA (Router Solicitation I route advertisement message) message negotiates with the network side for IPv6 address.
  • DHCP Dynamic Host Configuration Protocol
  • the pre-registration information of the PDN connection described above includes, but is not limited to, a PDN address, an APN, a TFT (traffic flow template), and a QoS (quality of service) information.
  • the UE does not necessarily switch to the eHRPD system immediately. As long as the E-UTRAN wireless signal can support the current service, the UE does not switch, and thus, the UE pre-registration information in the eHRPD. Need to maintain;
  • the time interval between the completion of the pre-registration and the formal handover by the UE is uncertain, so the refresh and maintenance duration of the pre-registration information is also indefinite.
  • the UE When the UE detects that the E-UTRAN signal is insufficient to support the current service, the UE is officially Switch from E-UTRAN to eHRPD.
  • the eHRPD session establishment signaling between the UE and the HRPD-eAN, the authentication and authorization signaling between the UE and the HSGW, and the establishment of the PDN connection signaling and the pre-registration information are all refreshed by ⁇ , ⁇ Forwarding, carried by the E-UTRAN radio signal between the UE and the eNB, the signaling between the eNB and the MME, and the S 101 signaling between the MME and the HRPD-eAN.
  • FIG. 4 is a flow chart of the second embodiment of the method according to the present invention, and the detailed steps are described below:
  • the UE accesses the EPC through the E-UTRAN and is in an Active state; multiple PDN connections are established for one APN. As a special case, there may be only one PDN connection under the APN.
  • the UE detects that the current E-UTRAN radio signal is weak by measuring the radio signal, and the eHRPD radio signal is good, and decides to initiate pre-registration to the eHRPD system;
  • the UE establishes an eHRPD session with the HRPD-eAN.
  • a data channel is established between the HRPD-eAN and the HSGW.
  • an A10 connection is established through Al 1 signaling;
  • the UE accesses the authentication and authorization of the eHRPD system.
  • the UE selects the newly established PDN connection to initiate pre-registration for it; as a special case, if there is only one PDN connection under the APN, pre-registration information is established for the unique PDN connection.
  • the PDN connection information is negotiated between the UE and the HSGW, the network layer negotiation of the PPP session, resource reservation and bearer establishment;
  • the UE does not necessarily switch to the eHRPD system immediately. As long as the E-UTRAN wireless signal can support the current service, the UE does not switch, and thus, the UE pre-registration information in the eHRPD. Need to maintain;
  • the UE may establish a new PDN connection under the APN where the PDN connection already exists, so the PDN connection with the pre-registration information is not the latest PDN. Connected, the newly established PDN connection is the latest PDN connection, and pre-registration information should be established for the PDN connection just established.
  • the UE initiates a request to establish pre-registration information for the newly established PDN connection by using a similar operation of step 407.
  • the HSGW finds that there is already a pre-registration information of the PDN connection under the APN, because the eHRPD system is not The "single APN multi-PDN connection" is supported. Therefore, the HSGW considers this to be an error operation and rejects the establishment of the PDN connection pre-registration information.
  • the reason for the error is: The PDN connection already exists under the APN.
  • This step is optional, because the UE knows the capability of the HSGW after a 409-step operation, and if the PDN connection pre-registration information is replaced in multiple PDN connections under another APN again. The UE already knows that the HSGW does not support the "single APN multi-PDN connection" technology, and the process directly jumps to step 410.
  • the UE connects to the pre-registration information release operation through the PDN, and negotiates with the HSGW to release the pre-registration information of the PDN connection with the pre-registration information.
  • the PDN connection pre-registration information release operation can be implemented by a PDN connection release and a resource deletion operation.
  • the UE establishes pre-registration information for the PDN connection just established through the operation steps of the same type 407.
  • this stage only completes the pre-registration, and the UE does not necessarily switch to the eHRPD system immediately. As long as the E-UTRAN wireless signal can support the current service, the UE will not switch, so that the UE is in the eHRPD. Pre-registration information also requires constant maintenance;
  • the time interval between the completion of the pre-registration and the formal handover by the UE is uncertain, so the refresh and maintenance duration of the pre-registration information is also indefinite.
  • the UE When the UE detects that the E-UTRAN signal is insufficient to support the current service, the UE officially switches from E-UTRAN to eHRPD.
  • the eHRPD session establishment signaling between the UE and the HRPD-eAN, the authentication and authorization signaling between the UE and the HSGW, and the establishment of the PDN connection signaling and the pre-registration information are all refreshed by ⁇ , ⁇ Forwarding, E-UTRAN wireless signal between the UE and the eNB,
  • the signaling between the eNB and the MME is carried by the S 101 signaling between the MME and the HRPD-eAN.
  • FIG. 5 is a third embodiment of the method according to the present invention. The detailed steps are described below:
  • the UE accesses the EPC through the E-UTRAN and is in an Active state; multiple PDN connections are established for one APN. As a special case, there may be only one PDN connection under the APN.
  • the UE detects that the current E-UTRAN radio signal is weak by measuring the radio signal, and the eHRPD radio signal is good, and decides to initiate pre-registration to the eHRPD system;
  • the UE establishes an eHRPD session with the HRPD-eAN.
  • a data channel is established between the HRPD-eAN and the HSGW.
  • an A10 connection is established through Al l signaling;
  • the UE accesses the authentication and authorization of the eHRPD system.
  • the UE selects the newly established PDN connection to initiate pre-registration for it; as a special case, if there is only one PDN connection under the APN, pre-registration information is established for the unique PDN connection.
  • the PDN connection information is negotiated between the UE and the HSGW, the network layer negotiation of the PPP session, resource reservation and bearer establishment;
  • the UE does not necessarily switch to the eHRPD system immediately after the UE prepares for pre-registration, the UE will not switch if the wireless signal of the E-UTRAN can support the current service.
  • the pre-registration information of the UE in the eHRPD needs to be maintained
  • the UE may establish a new PDN connection under the APN where the PDN connection already exists. Therefore, the PDN connection with the pre-registration information is not the latest PDN connection, and the newly established PDN connection is The latest PDN connection should establish pre-registration information for the PDN connection just established.
  • the UE establishes pre-registration information for the newly established PDN connection by using the same steps as step 507. 510.
  • the HSGW After receiving the establishment request of the PDN connection pre-registration information, the HSGW establishes pre-registration information for the latest PDN connection by modifying or using the newly established pre-registration information to overwrite the pre-registration information established by the original PDN connection.
  • the HSGW returns a response message to the UE, where the response message carries an indication that the newly created PDN connection pre-registration information has been modified/overwritten to the pre-registration information established by the original PDN connection.
  • step 510 performs the operation; after the step 510 completes the operation, the response is sent to the UE through the reply signal of step 509.
  • this stage only completes the pre-registration, and the UE does not necessarily switch to the eHRPD system immediately. As long as the E-UTRAN wireless signal can support the current service, the UE will not switch, so that the UE is in the eHRPD. Pre-registration information also requires constant maintenance;
  • the time interval between the completion of the pre-registration and the formal handover by the UE is uncertain, so the refresh and maintenance duration of the pre-registration information is also indefinite.
  • the UE When the UE detects that the E-UTRAN signal is insufficient to support the current service, the UE officially switches from E-UTRAN to eHRPD.
  • the eHRPD session establishment signaling between the UE and the HRPD-eAN, the authentication and authorization signaling between the UE and the HSGW, and the establishment of the PDN connection signaling and the pre-registration information are all refreshed by ⁇ , ⁇ Forwarding, carried by the E-UTRAN radio signal between the UE and the eNB, the signaling between the eNB and the MME, and the S 101 signaling between the MME and the HRPD-eAN.
  • This embodiment is very similar to the second embodiment.
  • the UE newly creates a PDN connection in the maintenance phase of the pre-registration information.
  • the UE is from the EPS during the maintenance phase of the pre-registration information.
  • the newly established PDN connection among multiple PDN connections corresponding to an APN is deleted in the system.
  • the UE also needs to establish pre-registration information for the newly established PDN connection in the PDN connection currently existing under the APN.
  • the flow chart can be seen in Figure 4, and the differences will be explained in the description of the steps below. 601-607, with steps 401-407;
  • the UE disconnects the PDN connection that has established the pre-registration information from the EPS system from the connection corresponding to multiple PDNs;
  • the UE After the UE completes the pre-registration preparation, the UE does not necessarily switch to the eHRPD system immediately. As long as the E-UTRAN wireless signal can support the current service, the UE will not switch, so the UE pre-registration information in the eHRPD needs to be maintained. ;
  • the UE may delete the PDN connection that has established the pre-registration information from the EPS system under the APN corresponding to multiple PDN connections. Therefore, the newly established PDN connection in the PDN connection currently existing under the APN should be selected. , establish pre-registration information for it.
  • the UE establishes pre-registration information for the newly established PDN connection in the currently existing PDN connection by using the same steps as step 607.
  • this stage only completes the pre-registration, and the UE does not necessarily switch to the eHRPD system immediately. As long as the E-UTRAN wireless signal can support the current service, the UE will not switch, so that the UE is in the eHRPD. Pre-registration information also requires constant maintenance;
  • the time interval between the completion of the pre-registration and the formal handover by the UE is uncertain, so the refresh and maintenance duration of the pre-registration information is also indefinite.
  • This embodiment is very similar to the third embodiment.
  • the UE newly creates a PDN connection in the maintenance phase of the pre-registration information.
  • the UE is from the EPS during the maintenance phase of the pre-registration information.
  • the newly established PDN connection among multiple PDN connections corresponding to an APN is deleted in the system.
  • the UE needs to establish pre-registration information for the newly established PDN connection in the PDN connection currently existing under the APN.
  • the flow chart can be seen in Figure 5, and the differences will be explained in the following step description. 701-707, the same steps 501 - 507;
  • the UE After the UE completes the pre-registration preparation, the UE does not necessarily switch to the eHRPD system immediately. As long as the E-UTRAN wireless signal can support the current service, the UE will not switch, so the UE pre-registration information in the eHRPD needs to be maintained. ;
  • the UE may delete the PDN connection that has established the pre-registration information from the EPS system under the APN corresponding to the multiple PDN connections. Therefore, the PDN connection newly established by the PDN currently existing under the APN should be selected. Establish pre-registration information for it.
  • the UE establishes pre-registration information for the newly established PDN connection in the currently existing PDN connection through the operation of class synchronization 707.
  • the HSGW After receiving the establishment request of the PDN connection pre-registration information, the HSGW establishes pre-registration information for the current latest PDN connection by modifying or using the newly established pre-registration information to overwrite the original PDN connection pre-registration information.
  • the HSGW carries an indication in the message that is sent to the UE, where the indication identifies that the newly created PDN connection pre-registration information has overwritten the pre-registration information of the original PDN connection.
  • steps 709 and 710 above is as follows: After the request is initiated by 709, the operation is performed in step 710; after the operation is completed in step 710, the response is sent to the UE through the reply signaling of step 709.
  • this stage only completes the pre-registration, and the UE does not necessarily switch to the eHRPD system immediately. As long as the E-UTRAN wireless signal can support the current service, the UE will not switch, so that the UE is in the eHRPD. Pre-registration information also requires constant maintenance;
  • the time interval between the completion of the pre-registration and the formal handover by the UE is uncertain, so the refresh and maintenance duration of the pre-registration information is also indefinite.
  • the operation of the UE to negotiate the establishment of the pre-registration information with the HSGW is specifically:
  • the UE sends a Device Vendor Defined Network Control Protocol Configuration Request (VSNCP-configure-Request) message to the HSGW, and the HSGW responds to the UE with a Device Provider Defined Network Control Protocol Configuration Acknowledgement (VSNCP-configure-Ack) message.
  • VSNCP-configure-Ack Device Provider Defined Network Control Protocol Configuration Acknowledgement
  • the HSGW sends a VSNCP-configure-Request message to the UE, and the UE responds to the HSGW with a VSNCP-configure-Ack message.
  • the HSGW may directly occur after the HSGW receives the VSNCP-configure-Request message of the UE, and does not need to wait for the VSNCP-configure-Ack to be sent to the UE, that is, the HSGW.
  • the VSNCP-configure-Request and VSNCP-configure-Ack messages sent to the UE have no necessary relationship.
  • the PDN is connected to the IPv4 address.
  • the UE performs IPv4 address negotiation with the network side through a DHCP (Dynamic Host Configuration Protocol) procedure. If the PDN connection has an IPv6 address, optionally, the UE passes the RS/ The RA (Router Solicitation I route advertisement message) message negotiates with the network side for IPv6 address.
  • DHCP Dynamic Host Configuration Protocol
  • the operation of the UE to negotiate the release of the pre-registration information with the HSGW is specifically:
  • the UE sends a device-defined network control protocol termination request (VSNCP-terminate-Request) signaling to the HSGW, and the HSGW responds to the user equipment with a device-defined network control protocol termination acknowledgement (VSNCP-terminate-Ack) signaling, and the two parties release the Pre-registration information for PDN connections.
  • VSNCP-terminate-Request device-defined network control protocol termination request
  • VSNCP-terminate-Ack device-defined network control protocol termination acknowledgement
  • the message process in which the UE negotiates to update/modify/cover the pre-registration information with the HSGW is the same as the process of establishing the operation, which is different in the internal processing of the UE and the HSGW.
  • Establishment refers to the establishment by nothing.
  • Update/modification refers to making changes on the basis of the original.
  • Coverage refers to the creation of new ones while deleting the old ones.
  • the pre-registration information of the PDN connection described above includes, but is not limited to, a PDN address, an APN, a TFT (traffic flow template), and a QoS (quality of service) information.
  • the E-UTRAN-eHRPD interconnection architecture if there are multiple PDN connections under a single APN in the E-UTRAN access system, when the UE is from E-UTRAN to eHRPD During the handover, if the eHRPD is an access system that does not support a single APN multi-PDN connection, it is guaranteed that pre-registration information is established only for the newly established PDN connection under the APN, and even if a new PDN connection is established, the pre-registration can be guaranteed. The information is updated and the pre-registration information is always guaranteed to be the latest established PDN connection.
  • the present invention is not limited to switching from the E-UTRAN system to the eHRPD system, and is also suitable from other access systems supporting a single APN multi-PDN connection to other access systems not supporting a single APN multi-PDN connection. Switch pre-registration.
  • the present invention also provides a system for implementing handover pre-registration, comprising: a user equipment, a source system, and a target system, where:
  • the user equipment is used to perform pre-registration before the handover from the source system to the target system, if the target system does not support multiple PDN connections under the same APN, only the newly established PDN connection in all PDN connections under the APN is established. Pre-registration information.
  • the maintenance phase of the pre-registration information if the new PDN connection under the APN is established from the source system, or the newly established PDN connection under the APN is deleted from the source system, The newly established PDN connection establishment pre-registration information in the currently existing PDN connection under the APN.
  • the user equipment is further configured to perform a PDN connection pre-registration information release operation, negotiate with the target system, and after the pre-registration information of the original PDN connection is released, initiate a PDN connection pre-registration information establishment operation, and negotiate with the target system to be current for the APN.
  • the newly established PDN connection in the existing PDN connection establishes pre-registration information.
  • the user equipment is further configured to directly initiate a PDN connection pre-registration information establishment operation, requesting the target system to establish pre-registration information for the newly established PDN connection in the currently existing PDN connection under the APN; the target system is configured to initiate a PDN connection pre-registration on the user equipment.
  • the newly established PDN connection in the PDN connection currently existing under the APN by modifying the pre-registration information of the original PDN connection or using the method of overwriting the pre-registration information of the original PDN connection with the newly established pre-registration information.
  • modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device, or they may be separately fabricated into individual integrated circuit modules, or they may be Multiple modules or steps are made into a single integrated circuit module. Thus, the invention is not limited to any particular combination of hardware and software.
  • the technical solution of the present invention can establish pre-registration information for the newly established PDN connection of the user equipment in multiple PDN connections under the same APN, thereby ensuring that the newly established PDN connection is switched to the target system.

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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 un procédé et un système pour réaliser un pré-enregistrement en vue d'un transfert intercellulaire. Lorsqu'un équipement d'utilisateur (UE) effectue un pré-enregistrement en vue d'un transfert intercellulaire avant un transfert depuis un système d'origine vers un système cible, si le système cible ne prend pas en charge l'existence de multiples connexions à un réseau à commutation de paquets (PDN) avec un seul nom de point d'accès (APN), des informations de pré-enregistrement sont déterminées uniquement pour la dernière connexion PDN établie parmi les multiples connexions PDN avec l'APN. Après que l'équipement d'utilisateur a déterminé les informations de pré-enregistrement, au cours de la phase de maintenance des informations de pré-enregistrement, si une nouvelle connexion PDN est établie dans le système source ou si la dernière connexion PDN établie est supprimée du système source, les informations de pré-enregistrement sont déterminées pour la dernière connexion PDN établie dans les connexions PDN existant à ce moment avec l'APN.
PCT/CN2010/077784 2009-10-20 2010-10-15 Procédé pour réaliser un pré-enregistrement en vue d'un transfert intercellulaire et système correspondant Ceased WO2011047609A1 (fr)

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CN105578539A (zh) * 2014-11-11 2016-05-11 中兴通讯股份有限公司 一种支持多pdn连接的优化切换的方法和相应网络节点
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