WO2013071819A1 - 实现身份位置分离、分配接口标识的方法及网元和ue - Google Patents

实现身份位置分离、分配接口标识的方法及网元和ue Download PDF

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Publication number
WO2013071819A1
WO2013071819A1 PCT/CN2012/083739 CN2012083739W WO2013071819A1 WO 2013071819 A1 WO2013071819 A1 WO 2013071819A1 CN 2012083739 W CN2012083739 W CN 2012083739W WO 2013071819 A1 WO2013071819 A1 WO 2013071819A1
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WIPO (PCT)
Prior art keywords
aid
network element
mme
sends
eps
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PCT/CN2012/083739
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English (en)
French (fr)
Inventor
骆文
沈炯
孙默
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中兴通讯股份有限公司
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Priority to US14/358,481 priority Critical patent/US9480091B2/en
Priority to EP12849807.8A priority patent/EP2782372B1/en
Publication of WO2013071819A1 publication Critical patent/WO2013071819A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00Network arrangements, protocols or services for addressing or naming
    • H04L61/09Mapping addresses
    • H04L61/10Mapping addresses of different types
    • H04L61/103Mapping addresses of different types across network layers, e.g. resolution of network layer into physical layer addresses or address resolution protocol [ARP]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00Network arrangements, protocols or services for addressing or naming
    • H04L61/50Address allocation
    • H04L61/5084Providing for device mobility
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/20Control channels or signalling for resource management
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W76/00Connection management
    • H04W76/10Connection setup
    • H04W76/11Allocation or use of connection identifiers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W8/00Network data management
    • H04W8/02Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H04W8/08Mobility data transfer
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2101/00Indexing scheme associated with group H04L61/00
    • H04L2101/60Types of network addresses
    • H04L2101/604Address structures or formats
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2101/00Indexing scheme associated with group H04L61/00
    • H04L2101/60Types of network addresses
    • H04L2101/668Internet protocol [IP] address subnets
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00Network arrangements, protocols or services for addressing or naming
    • H04L61/50Address allocation
    • H04L61/5007Internet protocol [IP] addresses
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W12/00Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/06Authentication
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W8/00Network data management
    • H04W8/26Network addressing or numbering for mobility support

Definitions

  • the present invention relates to the field of mobile communications technologies, and in particular, to a method for implementing identity location separation, a method for allocating an interface identifier, and a network element and a UE.
  • the 3rd Generation Partnership Project (3GPP) Evolved Packet System is an Evolved Universal Terrestrial Radio Access Network (Evolved Universal Terrestrial Radio Access Network).
  • E-UTRAN Mobility Management Entity
  • MME Mobility Management Entity
  • S-GW Serving Gateway
  • P-GW or PDN GW Packet Data Network Gateway
  • HSS Home Subscriber Server
  • AAA 3GPP Authenticated Authorization and Accounting
  • PCRF Policy and Charging Rules Function
  • the MME is responsible for control planes such as mobility management, non-access stratum signaling processing, and user mobility management context management; S-GW is and E The UTRAN-connected access gateway device forwards data between the E-UTRAN and the P-GW and is responsible for buffering the paging wait data.
  • control planes such as mobility management, non-access stratum signaling processing, and user mobility management context management
  • S-GW is and E
  • the UTRAN-connected access gateway device forwards data between the E-UTRAN and the P-GW and is responsible for buffering the paging wait data.
  • P-GW is the border gateway between EPS and Packet Data Network (PDN) network. It is responsible for PDN access and forwarding data between EPS and PDN.
  • the P-GW is responsible for the IP address assignment of the terminal and also the mobility anchor of the terminal. Regardless of where the terminal moves, data packets (IP packets) sent and received between the terminal and the outside world are always forwarded through the P-GW.
  • IP packets data packets sent and received between the terminal and the outside world are always forwarded through the P-GW.
  • Figure 2 shows a network based on identity and location separation.
  • Network architecture In the network architecture, the network is divided into access networks and backbone networks without overlapping, and the access network is located at the edge of the backbone network, responsible for access of all terminals, and the inter-terminal datagrams that the backbone network is responsible for accessing. Routing and forwarding.
  • the identity of the end user is represented by an AID (Access Identifier): The terminal is connected to the network no matter where it is located, and the terminal remains unchanged regardless of how it moves in the network.
  • AID Access Identifier
  • the location identifier of the terminal uses RID (Routing Identifier, Route ID) Indicates that it is assigned by the network and used on the backbone network. It is worth noting that different identity-based location separation architectures can have different names, but the essence is the same.
  • the terminal may be one or more of a mobile terminal, a fixed terminal, and a nomadic terminal, such as a mobile phone, a fixed telephone, a computer, a server, and the like.
  • the access network is used to provide Layer 2 (physical layer and link layer) access means for the terminal, and the physical connection between the maintenance terminal and the Access Service Router (ASR). Into the link.
  • the main network elements of the backbone network include: access service router ASR, Identity Location Register (IRR), and Common Router (CR).
  • ASR is an edge router of the backbone network. Its role is to assign RID to the terminal, and maintain the mapping relationship between the AID and the RID of the terminal and update the RID of the terminal saved by the ILR.
  • CN receives the terminal to the peer end of the terminal (Correspondent Node)
  • CN When the data message is sent, the RID of the CN that is queried by the ILR according to the AID of the CN, and the data message is forwarded to the CN according to the RID of the CN.
  • the terminal must access the backbone network through the ASR.
  • the RID assigned by the ASR to the terminal includes the address information of the ASR or the address of the ASR.
  • the ASR tunnels the data packet to the peer end by using the RID of the terminal and the RID of the peer end.
  • the ASR of the peer end receives the data packet encapsulated by the tunnel.
  • the RID tunnel encapsulation of the stripping layer is stripped, and the data packet is sent to the peer end.
  • the CR is a general router widely deployed in the backbone network.
  • the core router is configured to perform routing based on the RID in the data packet and forward the data packet with the RID as the destination address.
  • the ILR is used to store and maintain the identity of the terminal to the location identifier mapping information, that is, the AID to RID mapping relationship of the maintenance terminal, and handle registration, deregistration, and query of the terminal location.
  • the backbone network may also include: an Internet Service Router (ISR), which has an interface with a traditional IP network, ASR, and ILR, and is used to implement interconnection and interworking between the identity and location separation network and the traditional IP network.
  • ISR Internet Service Router
  • the above AIDs are generally chosen to be expressed in the format of an IP address, with transparent support for applications and terminal devices, ie, application socket connections or IP addresses, without modification.
  • the IP address of the AID only expresses the identity information of one terminal, and does not express the location information of the terminal. That is to say, although the AID uses the form of the IP address, it is not in the traditional sense.
  • the routable IP address, and as described above, uses the RID to express the location information of the terminal.
  • the ASR needs to know the RID of the peer end and receive the tunnel packet of the data packet when receiving the data packet sent by the terminal to the peer end.
  • the data packet encapsulated by the tunnel has two IP headers.
  • the source address of the outer IP header is the RID of the terminal, and the destination address is the RID of the peer; the inner IP header ( Inner IP Header)
  • the source address is the AID of the terminal, and the destination address is the AID of the peer. In this way, the terminal and the peer can communicate with each other.
  • the mobility relationship method based on the identity location separation technology relies on the tunnel encapsulation of the data packet, and the IP packet encapsulation is performed on the data packet sent by the terminal to the peer end, thereby adding the packet.
  • the length of the head leads to an increase in the overhead of the backbone network.
  • the application of the mobility management technology to the above-mentioned EPS network because the EPS itself supports the use of IPv6 (Internet Protocol Version 6), the use of the above tunnel encapsulation mechanism will further increase the resource consumption of the backbone network, and increase The cost of the backbone network.
  • Embodiments of the present invention provide a method for implementing identity location separation, which reduces resource consumption of a backbone network.
  • a method for implementing an identity location separation network according to an embodiment of the present invention is applicable to an EPS network using an identity location separation technology, where the method includes:
  • the EPS network side network element acquires an access identifier (AID) of the user equipment (UE), and sends the obtained AID to the UE;
  • the packet data network gateway (P-GW) attached to the UE allocates a subnet prefix to the UE, and sends the subnet prefix to the UE;
  • the UE uses the AID as an interface identifier part of an IPv6 address, and the subnet prefix is used as The subnet prefix part of the IPv6 address, synthesizes an IPv6 address, and configures the IPv6 address of the UE by using the IPv6 address.
  • the acquiring, by the EPS network side network element, the AID of the UE includes: the EPS network side network element querying an identity location register (IMR) or an authentication authentication server according to an International Mobile Subscriber Identity (IMSI) of the UE. Obtaining the AID of the UE.
  • IMR identity location register
  • IMSI International Mobile Subscriber Identity
  • the authentication authentication server comprises any one of the following servers: an authentication authentication charging (AAA) server, a home location register, and a home subscriber server.
  • AAA authentication authentication charging
  • the EPS network side network element includes any one of the following: a mobility management entity (MME), a P-GW, and a serving gateway (S-GW).
  • MME mobility management entity
  • P-GW Packet Data Network Gateway
  • S-GW serving gateway
  • the method further includes: when the UE sends a data packet to the opposite end (CN), it is an interface identifier part of the destination address of the data packet;
  • the P-GW attached to the UE After receiving the data packet sent by the UE, the P-GW attached to the UE obtains the RID of the CN, and replaces the subnet prefix part of the destination address of the data packet with the RID.
  • the data message is sent to the IP network.
  • the method further includes: receiving, by the P-GW to which the UE is attached, a subnet prefix allocated to the UE by the number of the UE, and sending the data packet to the UE.
  • the EPS network side network element is a mobility management entity (MME), and the MME sends the acquired AID to the UE, where the MME is in the process of establishing a bearer for the UE, or The MME sends the acquired AID to the UE in the process of the UE attaching, or the MME requests the PDN connection in the UE.
  • MME mobility management entity
  • the MME sends the acquired AID to the UE in the process of establishing a bearer for the UE, and the method includes: before the MME establishes a bearer for the UE, the MME is configured to establish a bearer for the terminal.
  • the IMSI of the UE queries the ILR or the AID of the UE that is obtained by the authentication and authentication server, and is sent to the UE in the active default EPS bearer context request message.
  • the MME sends the acquired AID to the UE during the UE attaching process, including: receiving an attach request sent by the UE or receiving the service gateway (S-GW) returning
  • S-GW service gateway
  • the IMR of the UE is queried according to the IMSI of the UE or the authentication authentication server acquires the AID of the UE, and the AID of the acquired UE is carried in an attach accept message and sent to the UE.
  • the MME sends the acquired AID to the UE in the process of the UE requesting the PDN connection, including: the MME receiving the PDN connection request message sent by the UE or receiving the creation session returned by the S-GW
  • the IMR of the UE is queried according to the IMSI of the UE or the authentication authentication server acquires the AID of the UE, and the AID of the acquired UE is carried in the PDN connection accept message and sent to the UE.
  • the EPS network side network element is a P-GW, and the P-GW sends the acquired AID to the UE, where: the P-GW is in the process of attaching the UE, or The P-GW sends the acquired AID to the UE in the process of requesting the PDN connection by the UE.
  • the EPS network side network element is a P-GW
  • the EPS network side network element acquires the AID of the UE, and sends the acquired AID to the UE
  • the P-GW is:
  • the P-GW when receiving the Create Session Request message, acquires the UE according to the IMSI of the UE or the authentication authentication server.
  • the AID in the create session response message returned to the S-GW, carries the AID of the UE, and sends the AID to the UE by using the S-GW and the MME.
  • the network side network element is an S-GW
  • the S-GW sends the acquired AID to the UE, where: the S-GW is in the process of attaching the UE, or the S The GW sends the acquired AID to the UE in the process of requesting the PDN connection by the UE.
  • the EPS network side network element is an S-GW
  • the EPS network side network element acquires the AID of the UE, and sends the acquired AID to the UE, where the S-GW is in the S-GW.
  • the S-GW receives the create session request message sent by the MME, or receives the create session response message sent by the P-GW, according to the The IMSI of the UE queries the ILR or the authentication server to obtain the AID of the UE, and carries the AID of the UE in the Create Session Reply message returned to the MME, and sends the AID to the UE by using the MME.
  • the method further includes: after the determining, by the network element on the EPS network side, the route identifier (RID), the RID is directed to the UE after determining the P-GW to which the UE is attached. a subnet prefix of the IPv6 address of the P-GW; the EPS network side network element sends the RID of the UE to the ILR, and the ALR saves the mapping relationship between the AID and the RID of the UE.
  • the route identifier RID
  • the packet data network gateway (P-GW) to which the UE is attached allocates a subnet prefix to the UE, and the P-GW allocates the RID of the EPS network side network element to the UE as a subnet prefix to the UE.
  • the UE uses the AID as an interface identifier part of an IPv6 address, including: the UE uses the AID as part of an interface identifier part of an IPv6 address, and generates another part of the interface identifier part, and The two parts are combined into an interface identification part of the IPv6 address.
  • the embodiment of the invention further provides a method for allocating an interface identifier to a terminal, which reduces resource consumption of the backbone network.
  • the method for assigning an interface identifier to a UE in an EPS network includes:
  • the network element of the EPS network is locally allocated or the interface identifier of the UE is obtained from the subscription information of the UE, and the obtained interface identifier is sent to the UE.
  • the EPS network side network element includes any one of the following: a mobility management entity (MME), a packet data network gateway (P-GW), and a serving gateway (S-GW).
  • MME mobility management entity
  • P-GW packet data network gateway
  • S-GW serving gateway
  • the EPS network side network element is a mobility management entity (MME), and the MME sends the obtained interface identifier to the UE, where the MME is in the process of establishing a bearer for the UE, or In the process of the UE attaching, the MME sends the acquired interface identifier to the UE in the process of requesting the PDN connection by the MME.
  • MME mobility management entity
  • the EPS network side network element is a P-GW, and the P-GW sends the obtained interface identifier to the UE, where: the P-GW is in the process of attaching the UE, or the P The GW sends the obtained interface identifier to the UE in the process of requesting the PDN connection by the UE.
  • the network side network element is an S-GW
  • the S-GW sends the obtained interface identifier to the UE, where: the S-GW is in the process of attaching the UE, or the S-GW
  • the GW sends the obtained interface identifier to the UE in the process of requesting the PDN connection by the UE.
  • the embodiment of the invention further provides a network side network element, and allocates an interface identifier to the terminal.
  • the present invention provides an EPS network side network element, including an obtaining module and a first sending module, where: the obtaining module is configured to acquire an access identifier (AID) of the terminal (UE);
  • the first sending module is configured to send the AID acquired by the acquiring module to the UE;
  • the EPS network side network element includes any one of the following: a mobility management entity (MME), a packet data network gateway (P-GW), and a serving gateway (S-GW).
  • MME mobility management entity
  • P-GW packet data network gateway
  • S-GW serving gateway
  • the P-GW further includes a subnet prefix allocation module and a second sending module, where:
  • the subnet prefix allocation module is configured to allocate a subnet prefix to the UE
  • the second sending module is configured to send a subnet prefix allocated by the allocating module to the
  • the P-GW further includes a replacement module, where the P-GW is configured to: after receiving the data packet sent by the UE, querying and obtaining the The RID of the UE (C) is used to replace the subnet prefix part of the destination address of the data packet with the RID, and then send the data packet to the IP network.
  • C The RID of the UE
  • the replacement module is further configured to: when receiving the data packet sent to the UE, replace the subnet prefix of the data packet destination address with the sub-P-GW assigned to the UE The network prefix is sent to the UE.
  • the acquiring module is configured to acquire the AID of the UE in the following manner:
  • the acquiring module acquires the AID of the UE according to an International Mobile Subscriber Identity (IMSI) of the UE, or an authentication authentication server to obtain an AID of the UE; or, locally allocates an AID of the UE;
  • IMSI International Mobile Subscriber Identity
  • the AID of the UE is obtained in the subscription information of the UE.
  • the EPS network side network element is a mobility management entity (MME), and the sending module is configured to send the AID acquired by the acquiring module to the UE in the following manner: the sending module In the process of establishing a bearer for the UE, or in the process of the UE attaching, or in the process of requesting the PDN connection by the UE, the AID acquired by the acquiring module is sent to the UE.
  • MME mobility management entity
  • the EPS network side network element is a P-GW
  • the sending module is configured to send the AID acquired by the acquiring module to the UE in the following manner: the sending module is in the UE During the attaching process, or in the process of requesting the PDN connection by the UE, the AID acquired by the acquiring module is sent to the UE.
  • the EPS network side network element is an S-GW
  • the sending module is configured to send the AID acquired by the acquiring module to the UE in the following manner: the sending module is in the UE During the attaching process, or in the process of requesting the PDN connection by the UE, the AID acquired by the acquiring module is sent to the UE.
  • the EPS network side network element further includes a route identifier (RID) allocation module and a third sending module, where: the RID allocation module is configured to: after the local network element determines the P-GW to which the UE is attached, Allocating a RID to the UE, the RID being a subnet prefix pointing to an IPv6 address of the P-GW; the third sending module, configured to send an RID of the UE to the ILR, by the ILR The mapping relationship between the AID and the RID of the UE is saved.
  • RID route identifier
  • the embodiment of the invention provides a terminal, and the IPv6 address configured for the terminal can reduce backbone network resource consumption during data transmission.
  • a terminal (UE) includes a receiving module and a configuration module, where: the receiving module is configured to receive an access identifier (AID) of the UE sent by an EPS network side network element, and Receiving a subnet prefix allocated by the P-GW to which the UE is attached;
  • AID access identifier
  • the configuration module is configured to use the AID as an interface identifier part of an IPv6 address, the subnet prefix is used as a subnet prefix part of the IPv6 address, and an IPv6 address is synthesized, and the IPv6 address of the UE is configured by using the IPv6 address. address.
  • the configuration module is configured to: use the AID as an interface identifier portion of the IPv6 address in the following manner: using the AID as part of an interface identifier portion of the IPv6 address, and generating another part of the interface identifier portion In one part, the two parts are combined into an interface identification part of the IPv6 address.
  • the terminal further includes a sending module, which is configured to send the UE to the opposite end (CN)
  • the AID of the CN is used as an interface identifier part of the destination address of the data packet.
  • Figure 1 is a schematic diagram of the structure of the related EPS system
  • Figure 2 is a network architecture diagram based on identity and location separation
  • Figure 3 is a schematic diagram of RID and AID forming a complete IPv6 address
  • Figure 5 is a flow chart showing a first embodiment of the present invention.
  • Figure 6 is a flow chart showing a second embodiment of the present invention.
  • Figure 7 is a flow chart showing a third embodiment of the present invention.
  • Figure 8 is a flow chart showing a fourth embodiment of the present invention.
  • Figure 9 is a schematic view showing the structure of a fifth embodiment of the present invention. Preferred embodiment of the invention
  • IPv6 is a next-generation IP protocol designed by the IETF (Internet Engineering Task Force) to replace the current version of the IP protocol (IPv4).
  • the global IPv6 unicast address (128 bits) consists of two logical parts: a subnet prefix (Subnet Prefix) and an interface ID (Interface Identifier).
  • the subnet prefix of the first N bits (such as the first 64 bits) is addressed to the local area network of the host, and the interface ID of the last 128-N bits (such as the last 64 bits) is located to the specific host interface.
  • the P-GW has the above-mentioned ASR function, and also needs to deploy the ILR in the EPS core network.
  • This paper proposes a method: Using IPv6, the subnet prefix and the interface identifier are used to make the AID of the terminal use the form (format) of the above interface identifier. Let the RID of the terminal use the form of the subnet prefix (format), combine the AID and the RID into an IPv6 address, and configure the IPv6 address of the UE by using the IPv6 address, thereby enabling the identity and location identifier of the terminal to be the same.
  • An IPv6 address is carried to solve the problem of increasing the overhead of the backbone network (core network) caused by the tunnel encapsulation to achieve identity location separation in the prior art.
  • the following subnet prefix is 64 bits (the first 64 bits of the 128-bit IPv6 address), and the interface ID is also
  • the 64-bit (the last 64 bits of the 128-bit IPv6 address) is described as an example:
  • the terminal also referred to as UE, User Equipment
  • the network element on the network side assigns a location identifier RID to the terminal.
  • the RID appears as a subnet prefix (for example, the first 64 bits of a 128-bit IPv6 address).
  • each terminal is also configured with an AID, which is generally determined by the end user when the operator signs up for the account opening, and is not The unique identifier is changed, but the AID is different from the format of the prior art using IPv6 (applied in the IPv6 environment) address, and is expressed in the format of the interface identifier (interface ID) part of the IPv6 address (for example, 128 bits) The last 64 bits of the IPv6 address).
  • the above RID and AID can form a complete IPv6 address.
  • Figure 4 shows the process of interworking between the UE and its peer (Correspondent Node, CN).
  • the peer end of the UE may be another UE, or may be other entities in the network (for example, a server, etc.), including the following. Steps:
  • Step 401 The opposite end (CN) of the UE sends a data packet to the UE.
  • the IPv6 data packet needs to be assembled, and the destination address of the IPv6 packet (the destination address is the IPv6 address of the UE) and the source address (the source address) are filled in. Is the IPv6 address of CN);
  • the last 64 bits of the destination address fill in the AID of the UE (that is, the interface ID of the UE as the destination address), that is, the destination address is not necessarily the IPv6 address currently configured by the UE.
  • the interface ID part of the destination address must be the AID of the UE; and the first 64 bits (subnet prefix) are arbitrary, for example, a fixed value specified by the operator.
  • the CN may query the AID of the UE from the DNS through the Domain Name of the UE.
  • the IPv6 address configured by the network to the CN, where the last 64 bits (interface ID) of the address is the CN's own AID, and the first 64 bits (subnet prefix) are the subnet prefix assigned by the network to the CN.
  • the RID is only on the ASR (P-GW) for the terminal, it is not required. Go down to the UE. Therefore, the value of the subnet prefix part of the IPv6 address of the UE or the CN is not limited here, and may not be the RID of the UE or the CN.
  • Step 402 The CN sends the foregoing data packet to the CN-connected ASR (P-GW), and the ASR is hereinafter referred to as ASR-CN;
  • Steps 403-404 The ASR-CN queries the ILR for the location identifier of the UE: ASR-CN will be the UE's
  • the AID is sent to the ILR, and the ILR returns the RID of the UE to the ASR-CN.
  • the ASR-CN reassembles the IPv6 packet. Specifically, the ASR-CN replaces the destination address of the IPv6 packet, and the first 64 bits. The subnet prefix is replaced with the RID of the UE. The last 64 bits of the IPv6 address are still the AID of the UE. In this case, the destination address carries the location identifier RID and the identity identifier AID of the UE.
  • Step 405 The ASR-CN sends the reassembled IPv6 packet to the backbone network, and depends on the subnet prefix of the IPv6 packet (the first 64 bits, that is, the RID of the UE), and the CR in the backbone network is routed according to IPv6.
  • the message may be routed to an ASR (P-GW) attached to the UE, and the ASR is hereinafter referred to as an ASR-UE;
  • the backbone network mentioned here is different from the access network between the UE and the ASR-CN.
  • the backbone network is an IP network, which can also be called a Packet Data Network (PDN). .
  • PDN Packet Data Network
  • Step 406-407 The ASR-UE determines the last receiver of the packet according to the last 64 bits of the received IPv6 data, that is, the AID of the UE, and sends the packet.
  • the ASR-UE sends the received IPv6 data packet to the UE, it preferably needs to check the subnet prefix of the destination address of the IPv6 data packet (ie, the first 64 bits, the UE's RSR), as follows: If the ASR-UE determines that the subnet prefix is the prefix allocated by the network to the UE when the UE enters the network, the ASR-UE sends the data packet directly; if not, the ASR-UE needs to replace the above The destination address of the IPv6 data packet, the subnet prefix of the destination address is replaced with the subnet prefix assigned by the network to the UE when the UE enters the network (the 64 bits are maintained, that is, the AID of the UE is unchanged), and then the data packet is received. Send it down.
  • the subnet prefix of the destination address of the IPv6 data packet ie, the first 64 bits, the UE's RSR
  • the following process is illustrated by a specific example: Assuming that the AID of the UE is 0x1234 0000 0000 0000, when the UE accesses the network, it accesses the mobile communication network and attaches to the ASR-UE (P-GW).
  • the subnet prefix assigned by the ASR-UE to the UE is OxAAAA 0000 0000 0000
  • the RID assigned by the network to the UE is OxBBBB 0000 0000 0000 0000.
  • the UE uses its own AID as the interface identifier of its own IPv6 address, and the IPv6 address of the UE. It is Ox AAAA 0000 0000 1234 0000 0000 0000 (ie subnet prefix + interface identifier).
  • the CN When the CN sends an IPv6 data packet to the UE, the CN needs to fill in the destination address of the packet, for example, it is filled in as Ox CCCC 0000 0000 0000 1234 0000 0000 0000, that is, the subnet prefix part can be filled in arbitrarily, and the interface ID part must be filled in.
  • the AID for the UE.
  • the ASR-CN When the ASR-CN receives the foregoing packet, the ALR needs to query the RID of the UE according to the AID of the UE. At this time, the ASR-CN learns that the RID of the UE is OxBBBB 0000 0000 0000. The ASR-CN replaces the destination address of the above IPv6 data with Ox BBBB 0000 0000 0000 1234 0000 0000 0000 (ie, the RID+AID of the UE). Depending on the subnet prefix of the address, the IPv6 routing mechanism can ensure that the data packet is routed to the ASR-UE.
  • the ASR-UE checks the IPv6 data packet again, and finds that the subnet prefix of the destination address (that is, the RID of the UE) is not the subnet prefix allocated to the UE when the UE enters the network, and then replaces the destination address of the message with the Ox AAAA. 0000 0000 0000 1234 0000 0000 0000, finally send the data to the UE.
  • the UE finds its own IPv6 address equal to the destination address of the message, and then receives and processes the message. It can be seen that, in the process of sending the foregoing IPv6 data message from the CN to the UE, the interface ID (the AID of the UE) part of the destination address is always unchanged.
  • the ASR-UE sends the message to the UE through the radio access network, for example, through a network element such as an S-GW or an eNodeB.
  • a network element such as an S-GW or an eNodeB.
  • the mobility management based on the identity location separation principle can be realized without using the tunnel encapsulation method, so that the problem of the backbone network resource consumption can be solved.
  • the AID of the UE is the interface ID part of the IPv6 address (for example, the last 64 bits), and the interface ID part of the IPv6 address of the UE must be fixed and unique.
  • This embodiment provides a method for configuring an identity AID for a UE when a bearer is established for a UE in an EPS. As shown in FIG. 5, the method includes the following steps:
  • Step 501 The MME initiates establishment of a bearer for the UE. Before establishing a default bearer, the MME first obtains the AID of the UE by using the ILR.
  • the MME may initiate the establishment of a bearer for the UE, or may be triggered based on other conditions. This is not the focus of the present invention and should not be construed as limiting the present invention.
  • the MME obtains the AID of the UE from the ILR. Specifically, the MME sends a request message to the ILR, where the identifier of the UE is used for authentication authentication, such as an International Mobile Subscriber Identification Number (IMSI); The above identifier looks up the AID of the UE and returns it to the MME.
  • IMSI International Mobile Subscriber Identification Number
  • the AID of the end user is specified by the contract, and when the user signs the contract with the operator, the operator can assign the AID to the user and save it in the ILR.
  • the AID can also be stored in the authentication server, such as Authentication, Authorization and Accounting (AAA) server, Home Subscriber Server (HSS), Home Location Register (Home Location). Register, HLR), etc., then the MME can obtain from the authentication authentication server at this time or when the UE is attached (for example, when acquiring the subscription information of the UE).
  • AAA Authentication, Authorization and Accounting
  • HSS Home Subscriber Server
  • HLR Home Location Register
  • the MME can obtain from the authentication authentication server at this time or when the UE is attached (for example, when acquiring the subscription information of the UE).
  • the AID described in this embodiment is not a complete IPv6 address, but an interface identifier part of an IPv6 address, for example, the last 64 bits of a 128-bit IPv6 address.
  • the interface identifier is a globally unique identifier, that is, an interface identifier is not allocated to two UEs.
  • Step 502 The MME sends a message to the UE, where the AID of the acquired UE is carried. It is worth noting that if the terminal user signs a plurality of AIDs when signing the contract with the operator, the MME may obtain the Multiple AIDs of the user, in this step, you can AID—Sent to the UE.
  • the MME may carry the AID of the UE in the active default EPS bearer context to the UE, and preferably also carry an indication to inform the UE that the parameter is the AID of the UE.
  • Step 503 After receiving the foregoing message, the UE saves the AID (one or more) carried therein locally, and marks it as the identity identifier AID of the UE itself, and returns a response message to the MME, such as returning the default EPS.
  • AID one or more
  • the MME such as returning the default EPS.
  • Step 504 At any subsequent time, when the UE wants to obtain its own IP address, it sends a Router Solicitation message to the P-GW currently serving the UE.
  • Step 505 Based on the routing information request message, the P-GW sends a Router Advertisement message to the UE, where the P-GW carries the subnet prefix of the IPv6 address allocated by the UE.
  • routing information broadcast message may also be sent by the P-GW to the UE actively, without relying on receiving the routing information request message sent by the UE.
  • the P-GW may also allocate an RID to the UE, which is a subnet prefix part of IPv6 as described above.
  • the P-GW may carry the RID in the routing information broadcast message and send it to the UE.
  • the P-GW can also send another subnet prefix different from the RID it assigns to the UE to the UE.
  • Step 506 It can be seen from the foregoing steps that, when the UE acquires its own AID and the subnet prefix allocated by the P-GW, the UE can splicing the two pieces of information (for example, in the manner shown in FIG. 3) to form one or Multiple complete IPv6 addresses, this (these) IPv6 interface identification part (eg, the last 64 bits) is the AID of the UE;
  • the PDN address field of the activating default EPS bearer context request message may be extended, and the AID and the indication are added therein; or in activating the default EPS bearer context request message. Add a new field, carry the above AID and instructions.
  • the UE can ensure that its IPv6 address is generated when generating its own IPv6 address.
  • the interface identification part of the address is the AID of the UE.
  • This embodiment is another method for configuring the identity identification AID of the terminal UE in the UE attachment process in the EPS. As shown in FIG. 6, the method includes the following steps:
  • Step 601 The UE sends an attach request (Attach Request) message to the MME through the radio access network, and initiates an initial attach procedure of the UE.
  • Step 602 Optionally, the UE performs an authentication process with the MME and the HSS.
  • Step 603 The MME sends a Create Session Request message to the S-GW.
  • Step 604 The S-GW sends a create session request message to the P-GW. After receiving the message, the P-GW creates a session for the UE, for example, creates a PDN context for the UE.
  • Step 605 The P-GW further needs to obtain the AID of the UE.
  • the P-GW sends a request to the ILR, and carries the identifier (such as IMSI) used by the UE for authentication, and the ILR returns the AID of the UE to the P-GW. If the AIR is stored in the ILR, the AIDs of the multiple UEs are returned to the P-GW.
  • the P-GW may also obtain the authentication server (such as AAA, HSS, or HLR). The AID of the UE.
  • Step 606 The P-GW returns a Create Session Response message to the S-GW, where the one or more AIDs of the acquired UE are carried, and preferably also carries an indication that the UE is the AID of the UE.
  • the AID of the UE described herein is in the form of an interface identifier part of an IPv6 address (for example, the last 64 bits of an IPv6 address);
  • the PDN Address Allocation field in the above-mentioned Create Session Response message may be extended to carry the AID of the UE and the indication; or, a new field is added in the Create Session Response message to carry the AID of the UE.
  • Step 607 The S-GW returns a create session response message to the MME, and the S-GW sends the AID of the UE to the MME according to the foregoing method.
  • Step 608 The MME sends an Attach Accept message to the UE through the access network. Carrying the AID of the UE, and preferably carrying the above indication;
  • the P-GW may also send it to the UE in a parameter configuration option (PCO) parameter.
  • PCO parameter configuration option
  • the parameter is used to transmit related information between the P-GW and the UE.
  • the P-GW may put the acquired AID of the UE in the PCO, first send it to the S-GW (for example, using the above-mentioned Create Session Response message), and then send it to the MME.
  • the MME sends the message to the UE, the UE Take out your own AID (one or more) in the PCO and save it locally.
  • Steps 609-611 Same as steps 504-506.
  • the AID of the UE may also be obtained by the S-GW, for example, the S-GW receives the Create Session Request message sent by the MME, or receives the Create Session Response message sent by the P-GW.
  • the AID of the UE is requested from the ILR or the authentication authentication server.
  • the P-GW is not required to obtain the AID of the UE, but only in step 607, the S-GW returns to the MME the AID of the UE carrying the session response message.
  • the MME may also acquire the UE.
  • the AID for example, when the MME receives the attach request from the UE, or receives the create session response message returned by the S-GW, requests the ALR of the UE from the ILR or the authentication authentication server.
  • the AID needs to be sent to the P-GW of the UE. For example, it is carried in the create session request and sent to the P-GW. Regardless of the method of obtaining the AID of the UE, the P-GW can acquire the AID of the UE and save it locally.
  • the RID After obtaining the AID of the UE, the RID needs to be allocated to the UE, and the RID is a subnet prefix as described above, and points to the P-GW to which the UE is attached (for example, the first 64 bits of the IPv6 address), for example, the RID is The subnet prefix part of the IPv6 address of the P-GW itself, including:
  • Method 1 The P-GW to which the UE is attached is allocated. For example, when the Create Session Request message of step 604 is received, the P-GW allocates an RID to the UE, or allocates an RID to the UE after acquiring the AID of the UE from the ILR in step 605. Or, in the same manner as the method in step 505, the UE is allocated in step 610. RID.
  • Method 2 The current S-GW of the UE allocates, for example, after receiving the create session request in step 603, after determining the P-GW to which the UE attaches (for example, the S-GW selects a P-GW for the UE, or the MME After selecting a P-GW for the UE, the selected P-GW is notified to the S-GW), and using a subnet prefix pointing to the address of the P-GW as the RID of the UE, preferably selecting the sub-IPv6 address of the P-GW.
  • the network prefix is used as the RID of the UE.
  • the S-GW may also allocate the RID to the UE when the session response message is created in step 606. At this time, the P-GW attached to the UE has been determined.
  • Method 3 The current MME of the UE allocates, for example, after receiving the attach request of step 601 (preferably after authentication authentication), after determining the P-GW to which the UE is attached (for example, the MME selects a P-GW for the UE), Using a subnet prefix pointing to the address of the P-GW as the RID of the UE, preferably selecting the subnet prefix of the IPv6 address of the P-GW as the RID of the UE; the MME may also give the session response after receiving the step 607.
  • the UE allocates the RID, and the P-GW to which the UE is attached has been determined.
  • the RID After the R-ID is allocated to the UE by the P-GW or the S-GW or the MME, the RID needs to be notified to the ILR, so that the ILR maintains the mapping relationship between the AID and the RID of the UE.
  • the message may be sent by the P-GW or the S-GW or the MME to the ILR, carrying the RID of the UE and the AID of the UE or the identifier of the UE for authentication (such as IMSI). It is worth noting that the ILR is informed to the ILR that the RID of the UE is not necessarily performed by the entity that allocates the RID of the UE.
  • the MME may allocate the RID to the UE, but the P-GW notifies the ILR as long as the MME notifies the assigned RID to the P-GW (e.g., through the Create Session Request message of steps 603, 604). That is to say, the RID and the RID can be obtained in the same or different process.
  • the network element that obtains the RID and the network element that sends the RID can be the same or different.
  • the network side network element obtains the AID and sends the AID to the UE in the same process or in different processes.
  • the network element that obtains the AID and the network element that sends the AID to the UE may also be the same or different. .
  • the above method is to allocate an RID to the UE after acquiring the AID of the UE, and send the RID to the ILR.
  • the RID can be allocated to the UE as long as the P-GW to which the UE is attached is determined. This can send the already assigned RID to the ILR while requesting the AID of the UE from the ILR.
  • This embodiment is another method for configuring the identity AID for the UE in the EPS. As shown in FIG. 7, the method includes the following steps: Step 701: The UE sends a PDN Connectivity Request (PDN Connectivity Request) message to the MME to request PDN connection;
  • PDN Connectivity Request PDN Connectivity Request
  • Steps 702-706 the same steps 603-607;
  • Step 707 The MME sends a PDN Connectivity Accept message to the UE, where the AID of the UE is carried, and an indication indicating that the parameter is the AID of the UE is carried.
  • Steps 708-710 Steps 504-506.
  • This embodiment describes a method for deleting an RID.
  • the location identifier RID of the UE that is saved by the ILR needs to be deleted. As shown in FIG. 8, the following steps are specifically included:
  • Step 801 When the UE wants to disconnect its PDN, it sends a PDN Disconnection Request message to the MME.
  • Step 802 The MME sends a Delete Session Request message to the S-GW.
  • This process can also be performed from this step, corresponding to the scenario initiated by the MME to disconnect the PDN.
  • Step 803 The S-GW sends a Delete Session Request message to the P-GW.
  • Step 804 The P-GW sends a message deletion location identifier to the ILR, and carries the RID of the UE and the identifier used by the UE for authentication authentication (such as IMSI) or the AID of the UE.
  • the P-GW may determine that the UE sends the message to the identity location register when the UE deletes the last active PDN connection.
  • Step ⁇ 5 The P-GW returns a Delete Session Response message to the S-GW;
  • Step 806 The S-GW returns a Delete Session Response message to the MME.
  • Steps 807-810 The MME sends a Deactivate Bearer Request message to the radio access network (eg, the base station); the radio access network sends an RRC Connection Reconfiguration message to the UE; The network returns to the RRC connection reconfiguration complete response; the radio access network returns a 7-load deactivation response to the MME.
  • the radio access network eg, the base station
  • the radio access network sends an RRC Connection Reconfiguration message to the UE
  • the network returns to the RRC connection reconfiguration complete response
  • the radio access network returns a 7-load deactivation response to the MME.
  • Step 811 The next step in the deletion of the PDN connection.
  • the MME and the S-GW may also initiate a request to the ILR to delete the RID of the UE saved by the ILR in the process.
  • the MME receives the PDN disconnection request in step 801, or receives the delete session response in step 806, or receives the bearer deactivation response in step 810, and initiates a request to the ILR to carry the identifier of the UE for authentication. (For example, IMSI), or carrying the AID of the UE, and preferably also carrying the RID of the UE, to delete the RID information of the UE saved by the ILR.
  • the S-GW when the S-GW receives the delete session request in step 802, or deletes the session response in step 805, it initiates a request to the ILR, carries the identifier of the UE for authentication (eg, IMSI), or carries the AID of the UE. And preferably also carrying the RID of the UE, to delete the RID information of the UE saved by the ILR.
  • the foregoing embodiments provide a method for the network side network element (eg, P-GW, S-GW, MME) to send the AID of the UE to the UE, where the AID of the UE is an interface in the IPv6 address. ID part.
  • the network side network element eg, P-GW, S-GW, MME
  • the AID of the UE is an interface in the IPv6 address. ID part.
  • a part of the interface identifier of the above IPv6 address can be actually used as the AID of the UE.
  • the interface ID portion is the last 64 bits of the complete IPv6 address, and the last 64 bits are used as the AID of the UE.
  • the first 48 bits of the last 64 bits can be used as the AID of the UE.
  • the network side can also send the AID of the UE to the UE, except that the AID is only a part of the interface ID part of the IPv6 address. Then, when configuring the IPv6 address of the UE, the UE needs to generate the interface ID in addition to the subnet prefix obtained from the P-GW. At this time, since the UE has obtained its own AID, which is part of the interface ID, the UE only needs to generate another part of the interface ID (for example, randomly generated). For example, in the above example, the AID is 48 bits, and the UE randomly generates a 16 The digit of the bit, combined with the AID into a 64-bit interface ID.
  • the general way for a UE to acquire its own IPv6 address is to advertise an IPv6 64-bit subnet prefix to it by the P-GW, and then the UE itself
  • the 64-bit interface ID part is configured to form a complete IPv6 address, that is, the interface ID part of the IPv6 of the UE is not specified by the network.
  • the interface ID does not have the meaning of the above identity, and there is no need to deploy the ILR.
  • the network side (such as the MME, the P-GW, and the S-GW described above) does not need to obtain the interface identifier of the UE from the ILR, but only needs to locally allocate or obtain the interface ID that needs to be allocated to the UE from the subscription information of the UE. Then, the method for sending the AID of the UE to the UE is used, and the interface identifier is sent to the UE. In this way, the purpose of assigning a certain IPv6 address to the UE by the EPS can be achieved.
  • the embodiment provides an EPS network side network element that implements the foregoing method. As shown in FIG. 9, the method includes an obtaining module and a first sending module, where:
  • the acquiring module is configured to acquire an AID of the UE
  • the first sending module is configured to send the AID acquired by the acquiring module to the
  • the EPS network side network element includes any one of the following: an MME, a P-GW, and an S-GW.
  • the P-GW further includes a subnet prefix allocation module and a second sending module, where: the subnet prefix allocation module is configured to allocate a subnet to the UE. a second sending module, configured to send a subnet prefix allocated by the allocating module to the UE.
  • the P-GW further includes a replacement module, where the P-GW is configured to: after receiving the data packet sent by the UE, the query obtains the After the RID of the peer (CN) of the UE replaces the subnet prefix part of the destination address of the data packet with the RID, the data packet is sent to the IP network.
  • the P-GW is configured to: after receiving the data packet sent by the UE, the query obtains the After the RID of the peer (CN) of the UE replaces the subnet prefix part of the destination address of the data packet with the RID, the data packet is sent to the IP network.
  • the replacement module is further configured to: when receiving the data packet addressed to the UE, And replacing the subnet prefix of the data packet with the subnet prefix allocated by the P-GW for the UE, and then sending the data packet to the UE.
  • the acquiring module is configured to acquire an AID of the UE by: obtaining, by the acquiring module, an Identity Location Register (IMR) or an authentication authentication server according to an International Mobile Subscriber Identity (IMSI) of the UE, The AID of the UE is used; or the AID of the UE is allocated locally; or the AID of the UE is obtained from the subscription information of the UE.
  • IMR Identity Location Register
  • IMSI International Mobile Subscriber Identity
  • the EPS network side network element is an MME
  • the sending module is configured to: send the AID acquired by the acquiring module to the UE in the following manner:
  • the sending module is in the process of establishing a bearer for the UE, Or, in the process of the UE attaching, or in the process of requesting the PDN connection by the UE, sending the AID acquired by the acquiring module to the UE.
  • the EPS network side network element is a P-GW
  • the sending module is configured to send the AID acquired by the acquiring module to the UE in the following manner: the sending module is in the UE attaching process, Or sending the AID obtained by the obtaining module to the UE in the process of requesting the PDN connection by the UE.
  • the EPS network side network element is an S-GW
  • the sending module is configured to send the AID acquired by the acquiring module to the UE in the following manner: the sending module is in the UE attaching process, Or sending the AID acquired by the acquiring module to the UE in the process of requesting the PDN connection by the UE.
  • the EPS network side network element further includes a route identifier (RID) allocation module and a third sending module, where: the RID allocation module is configured to: after the local network element determines the P-GW to which the UE is attached, The UE allocates an RID, where the RID is a subnet prefix that points to an IPv6 address of the P-GW;
  • RID route identifier
  • the third sending module is configured to send the RID of the UE to the ILR, and the mapping between the AID and the RID of the UE is saved by the ILR.
  • the UE that implements the foregoing method includes a receiving module and a configuration module, where: the receiving module is configured to receive an AID of the UE sent by the network element on the EPS network side, and to receive the P- attached to the UE. Subnet prefix assigned by GW;
  • the configuration module is configured to use the AID as an interface identifier part of an IPv6 address, the subnet prefix is used as a subnet prefix part of the IPv6 address, and is combined into an IPv6 address, and the IPv6 address of the UE is configured by using the IPv6 address. .
  • the configuration module can use the AID as an interface identifier part of the IPv6 address in the following manner:
  • the AID is taken as part of the interface identification portion of the IPv6 address, and another portion of the interface identification portion is generated, and the two portions are combined into an interface identification portion of the IPv6 address.
  • the UE further includes a sending module, configured to send the AID of the CN to the opposite end (CN) as an interface identifier part of the destination address of the data text.
  • a sending module configured to send the AID of the CN to the opposite end (CN) as an interface identifier part of the destination address of the data text.
  • the method, the network element, or the UE in the embodiment of the present invention does not need to encapsulate the data packet when the UE and the peer end perform data transmission, thereby reducing the resource consumption of the backbone network and reducing the cost of the backbone network.

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Abstract

本发明实施例公开了一种实现身份位置分离、分配接口标识的方法及网元和终端。所述实现身份位置分离网络的方法包括:EPS网络侧网元获取用户设备(UE)的接入标识(AID),并将所述获取到的AID发送给所述UE;所述UE附着的分组数据网络网关(P-GW)为UE分配子网前缀,并将该子网前缀发送给所述UE;所述UE将所述AID作为IPv6地址的接口标识部分,所述子网前缀作为所述IPv6地址的子网前缀部分,组合成IPv6地址,使用所述IPv6地址配置UE自身的IPv6地址。

Description

实现身份位置分离、 分配接口标识的方法及网元和 UE
技术领域
本发明涉及移动通信技术领域,尤其涉及一种实现身份位置分离的方法、 分配接口标识的方法及网元和 UE。
背景技术
第三代合作伙伴计划 ( 3rd Generation Partnership Project, 简称为 3GPP ) 演进的分组系统( Evolved Packet System, 简称为 EPS ) 由演进的通用移动通 信系统陆地无线接入网 ( Evolved Universal Terrestrial Radio Access Network , 简称为 E-UTRAN ) 、 移动性管理实体 ( Mobility Management Entity, 简称为 MME ) 、 服务网关( Serving Gateway, S-GW ) 、 分组数据网络网关(Packet Data Network Gateway,简称为 P-GW或者 PDN GW)、归属用户服务器( Home Subscriber Server, 简称为 HSS ) 、 3 GPP的认证授权计费 (Authentication, Authorization and Accounting, 简称为 AAA )服务器, 策略和计费规则功能 ( Policy and Charging Rules Function, 简称为 PCRF ) 实体及其他支撑节点组 成。 图 1是相关的 EPS系统架构的示意图, 如图所示, MME负责移动性管 理、非接入层信令的处理和用户移动管理上下文的管理等控制面的相关工作; S-GW是与 E-UTRAN相连的接入网关设备,在 E-UTRAN和 P-GW之间转发 数据, 并且负责对寻呼等待数据进行緩存。
P-GW则是 EPS与分组数据网络( Packet Data Network, 简称为 PDN ) 网络的边界网关,负责 PDN的接入及在 EPS与 PDN间转发数据等功能。 P-GW 负责终端的 IP地址分配, 同时也是终端的移动锚点。 无论终端移动到何处, 终端与外界之间收发的数据报文(IP报文), 都始终需要经过 P-GW来转发。 这样的移动性管理方案会导致业界公认的路由迂回问题, 即当终端与其通信 对端间的距离 艮接近, 而又远离终端的锚点(P-GW )时, 终端与对端之间收 发数据报文也必须绕至锚点路由。
业界目前提出了一系列基于用户身份和位置分离技术的新的移动性管理 技术, 可解决上述路由迂回问题。 图 2所示为一种基于身份与位置分离的网 络架构。 在该网络架构中, 网络在拓朴上被划分为没有重叠的接入网和骨干 网, 接入网位于骨干网的边缘, 负责所有终端的接入, 骨干网负责接入的终 端间数据报文的路由和转发。终端用户的身份标识使用 AID( Access Identifier, 接入标识)表示: 终端无论在何处接入网络, 以及终端无论在网络中如何移 动均终保持不变; 终端的位置标识使用 RID ( Routing Identifier, 路由标识) 表示, 由网络为其分配, 在骨干网使用。 值得说明的是, 不同的基于身份位 置分离的架构可以有不同的名称, 但实质是一样的。 且终端可以是移动终端、 固定终端和游牧终端中的一种或多种, 如手机、 固定电话、 电脑和服务器等 等。
在图 2所示的网络架构中, 接入网用于为终端提供二层(物理层和链路 层)接入手段, 维护终端与接入服务路由器(Access Service Router, ASR ) 间的物理接入链路。 骨干网的主要网元包括: 接入服务路由器 ASR、 身份位 置哥存器 ( Identity Location Register, ILR ) 、 通用路由器 ( Common Router, CR ) 。
ASR是骨干网的边缘路由器, 其作用是为终端分配 RID, 并在本地维护 终端的 AID至 RID的映射关系以及更新 ILR保存的该终端的 RID; 当收到终 端向终端的对端 (Correspondent Node, CN )发送的数据报文时, 到 ILR依 据 CN的 AID查询的 CN的 RID, 并依据 CN的 RID将数据报文向 CN转发 等。 终端须经过 ASR接入骨干网, 上述 ASR为终端分配的 RID包含该 ASR 的地址信息,或者说指向本 ASR的地址。 ASR在收到终端发向对端的数据报 文后,使用终端的 RID及对端的 RID对该数据报文进行隧道封装并发往对端; 当对端的 ASR在收到该隧道封装后的数据报文时,剥除外层的 RID隧道封装, 再将数据报文发给对端。 CR是骨干网中广泛部署的一般路由器, 例如其中的 核心路由器, 其作用是根据数据报文中的 RID进行选路, 转发以 RID为目的 地址的数据报文。 ILR用于保存和维护终端的身份标识至位置标识映射信息, 即维护终端的 AID至 RID映射关系 ,处理对终端位置的注册、去注册和查询。 值得说明的是, 骨干网还可以包括: 互联服务节点 (Internet Service Router, ISR), 具有与传统 IP网络、 ASR和 ILR的接口, 用于实现身份、 位置分离网 络与传统 IP网络的互联互通。 为了兼容现有的 IP网络,上述 AID—般选择使用 IP地址的格式来表达, 以对应用程序和终端设备的透明支持,即应用程序套接字连接的还是 IP地址, 而不必改动。但在实际的语义上,该作为 AID的 IP地址的仅表达一个终端的 身份信息, 并不表达该终端的位置信息,也就是说 AID虽然釆用 IP地址的形 式, 但其已不是传统意义上的可路由的 IP地址, 而如上文所述, 使用 RID来 表达终端的位置信息。 ASR为了实现报文的正常转发, 在收到终端发往对端 的数据报文时, ASR需要获知对端的 RID, 并将该数据报文做隧道封装。 隧 道封装后的数据报文拥有两个 IP头部, 外层 IP头部( Outer IP Header ) 的源 地址是终端的 RID, 目的地地址是对端的 RID; 内层 IP头部( Inner IP Header ) 的源地址是终端的 AID , 目的地地址是对端的 AID。 如此可实现终端与对端 的互通。
如上文所述, 基于身份位置分离技术的移动性关系方法, 其依赖于对数 据报文做隧道封装, 需要将终端发给对端的数据报文再做一次 IP报文封装, 这样增加了报文的头部的长度, 导致骨干网的开销增加。 特别是将这种移动 性管理技术应用在上述 EPS网络中,由于 EPS本身支持也比较优选使用 IPv6 ( Internet Protocol Version 6 ) , 这样使用上述隧道封装机制, 会进一步加剧 对骨干网的资源消耗, 增加骨干网的成本。 发明内容
本发明实施例提供一种实现身份位置分离的方法, 减少骨干网的资源消 耗。
本发明实施例提供的一种实现身份位置分离网络的方法, 所述方法适用 于应用身份位置分离技术的 EPS网络中, 所述方法包括:
EPS 网络侧网元获取用户设备 ( UE ) 的接入标识(AID ) , 并将所述获 取到的 AID发送给所述 UE;
所述 UE附着的分组数据网络网关 (P-GW )为 UE分配子网前缀, 并将 该子网前缀发送给所述 UE;
所述 UE将所述 AID作为 IPv6地址的接口标识部分,所述子网前缀作为 所述 IPv6地址的子网前缀部分, 组合成 IPv6地址, 使用所述 IPv6地址配置 UE自身的 IPv6地址。
较佳地, 所述 EPS网络侧网元获取 UE的 AID , 包括: 所述 EPS网络侧 网元依据所述 UE的国际移动用户识别码( IMSI )查询身份位置寄存器( ILR ) 或者鉴权认证服务器, 获取所述 UE的所述 AID。
较佳地, 所述鉴权认证服务器包括以下服务器中的任意一种: 鉴权认证 计费 (AAA )服务器、 归属位置寄存器、 归属用户服务器。
较佳地, 所述 EPS 网络侧网元包括以下任意之一: 移动性管理实体 ( MME ) 、 P-GW、 服务网关 (S-GW ) 。
较佳地, 所述方法还包括: 所述 UE向其对端 (CN )发送数据报文时, 为所述数据报文的目的地址的接口标识部分;
所述 UE附着的 P-GW接收到所述 UE发送的数据报文后,查询获得所述 CN的 RID, 使用所述 RID替换所述数据报文的目的地址的子网前缀部分后, 将所述数据报文发送至 IP网。
较佳地,所述方法还包括: 所述 UE附着的 P-GW收到发往所述 UE的数 为所述 UE分配的子网前缀, 并将所述数据报文发送给所述 UE。
较佳地, 所述 EPS网络侧网元为移动性管理实体(MME ) , 所述 MME 将获取到的 AID发送给所述 UE, 包括: 所述 MME在为所述 UE建立承载过 程中, 或者所述 MME在所述 UE附着过程中, 或者所述 MME在所述 UE请 求 PDN连接过程中, 将获取到的 AID发送给所述 UE。
较佳地, 所述 MME在为 UE建立承载过程中, 将获取到的 AID发送给 UE, 包括: 所述 MME在为所述 UE建立承载过程中, 将所述 MME在为终 端建立承载前依据所述 UE的 IMSI查询 ILR或者鉴权认证服务器获取到的所 述 UE的 AID, 携带在激活默认 EPS承载上下文请求消息中发送给 UE。
较佳地, 所述 MME在 UE附着过程中, 将获取到的 AID发送给 UE, 包 括: 在接收到 UE发送的附着请求或者在接收到服务网关 ( S-GW )返回的创 建会话应答消息时,依据所述 UE的 IMSI查询 ILR或者鉴权认证服务器获取 所述 UE的 AID, 将所述获取到的 UE的 AID携带在附着接受消息中发送给 UE。
较佳地 , 所述 MME在 UE请求 PDN连接过程中 , 将获取到的 AID发送 给 UE, 包括: 所述 MME在接收到 UE发送的 PDN连接请求消息或者在接 收到 S-GW返回的创建会话应答消息时,依据所述 UE的 IMSI查询 ILR或者 鉴权认证服务器获取所述 UE的 AID ,将所述获取到的 UE的 AID携带在 PDN 连接接受消息中发送给 UE。
较佳地, 所述 EPS网络侧网元为 P-GW , 所述 P-GW将获取到的 AID发 送给所述 UE, 包括: 所述 P-GW在所述 UE附着过程中, 或者所述 P-GW在 所述 UE请求 PDN连接过程中, 将所述获取到的 AID发送给所述 UE。
较佳地, 所述 EPS网络侧网元为 P-GW , 所述 EPS网络侧网元获取 UE 的 AID, 并将所述获取到的 AID发送给所述 UE, 包括: 所述 P-GW在所述 UE附着过程中, 或者在所述 UE请求 PDN连接过程中, 所述 P-GW在接收 到创建会话请求消息时,依据所述 UE的 IMSI查询 ILR或鉴权认证服务器获 取所述 UE的 AID, 在向 S-GW返回的创建会话应答消息中携带所述 UE的 AID, 通过 S-GW、 MME将所述 AID发送给 UE。
较佳地, 所述网络侧网元为 S-GW, 所述 S-GW将获取到的 AID发送给 所述 UE, 包括: 所述 S-GW在所述 UE附着过程中, 或者所述 S-GW在所述 UE请求 PDN连接过程中, 将所述获取到的 AID发送给所述 UE。
较佳地, 所述 EPS网络侧网元为 S-GW, 所述 EPS网络侧网元获取 UE 的 AID, 并将所述获取到的 AID发送给所述 UE, 包括: 所述 S-GW在所述 UE附着过程中, 或者在所述 UE请求 PDN连接过程中, 所述 S-GW在接收 到 MME发送的创建会话请求消息, 或者在接收到 P-GW发送的创建会话响 应消息时, 依据所述 UE的 IMSI查询 ILR或鉴权认证服务器获取所述 UE的 AID,在向 MME返回的创建会话应答消息中携带所述 UE的 AID,通过 MME 将所述 AID发送给 UE。
较佳地, 所述方法还包括: 在所述 EPS网络侧网元在确定了所述 UE附 着的 P-GW之后, 为所述 UE分配路由标识( RID ) , 所述 RID为指向所述 P-GW的 IPv6地址的子网前缀; 所述 EPS网络侧网元将所述 UE的 RID发送 至所述 ILR, 由所述 ILR保存所述 UE的 AID至 RID的映射关系。
较佳地, 所述 UE附着的分组数据网络网关 (P-GW )为 UE分配子网前 缀包括: 所述 P-GW将 EPS网络侧网元分配给 UE的 RID作为子网前缀分配 给 UE。
较佳地, 所述 UE将所述 AID作为 IPv6地址的接口标识部分, 包括: 所述 UE将所述 AID作为 IPv6地址的接口标识部分的一部分,并生成所 述接口标识部分的另一部分, 将所述两个部分组合成所述 IPv6地址的接口标 识部分。
本发明实施例还提供一种为终端分配接口标识的方法, 减少骨干网的资 源消耗。
本发明提供的一种 EPS网络中为 UE分配接口标识的方法, 包括:
EPS网络侧网元本地分配或者从 UE的签约信息中获取该 UE的接口标 识, 将获取到的接口标识发送给 UE。
较佳地, 所述 EPS 网络侧网元包括以下任意之一: 移动性管理实体 ( MME ) 、 分组数据网络网关 (P-GW ) 、 服务网关 (S-GW ) 。
较佳地, 所述 EPS网络侧网元为移动性管理实体(MME ) , 所述 MME 将获取到的接口标识发送给 UE , 包括: 所述 MME在为所述 UE建立承载过 程中, 或者所述 MME在所述 UE附着过程中, 或者所述 MME在所述 UE请 求 PDN连接过程中, 将获取到的接口标识发送给所述 UE。
较佳地, 所述 EPS网络侧网元为 P-GW, 所述 P-GW将获取到的接口标 识发送给 UE, 包括: 所述 P-GW在所述 UE附着过程中, 或者所述 P-GW在 所述 UE请求 PDN连接过程中, 将获取到的接口标识发送给所述 UE。
较佳地, 所述网络侧网元为 S-GW, 所述 S-GW将获取到的接口标识发 送给 UE, 包括: 所述 S-GW在所述 UE附着过程中, 或者所述 S-GW在所述 UE请求 PDN连接过程中, 将获取到的接口标识发送给所述 UE。 本发明实施例还提供一种网络侧网元, 为终端分配接口标识。 本发明提供一种 EPS网络侧网元, 包括获取模块和第一发送模块,其中: 所述获取模块, 设置为获取终端 (UE ) 的接入标识(AID ) ;
所述第一发送模块, 设置为将所述获取模块获取到的 AID发送给所述 UE;
较佳地, 所述 EPS 网络侧网元包括以下任意之一: 移动性管理实体 ( MME ) 、 分组数据网络网关 (P-GW ) 、 服务网关 (S-GW ) 。
较佳地, 所述 EPS网络侧网元为 UE附着的 P-GW时, 所述 P-GW还包 括子网前缀分配模块和第二发送模块, 其中:
所述子网前缀分配模块, 设置为为 UE分配子网前缀;
所述第二发送模块, 设置为将所述分配模块分配的子网前缀发送给所述
UE;
较佳地, 所述 EPS网络侧网元为 UE附着的 P-GW时, 所述 P-GW还包 括替换模块, 其设置为: 在接收到所述 UE发送的数据报文后, 查询获得所 述 UE对端( CN )的 RID , 使用所述 RID替换所述数据报文的目的地址的子 网前缀部分后, 将所述数据报文发送至 IP网。
较佳地, 所述替换模块还用于在收到发往所述 UE的数据报文时, 将所 述数据报文目的地址的子网前缀替换为本 P-GW为所述 UE分配的子网前缀, 再将所述数据报文发送给所述 UE。
较佳地, 所述获取模块是设置为釆用以下方式获取 UE的 AID:
所述获取模块依据所述 UE的国际移动用户识别码(IMSI )查询身份位 置寄存器(ILR )或者鉴权认证服务器, 获取所述 UE的所述 AID; 或者, 本 地分配 UE的 AID; 或者, 从 UE的签约信息中获取所述 UE的 AID。
较佳地, 所述 EPS网络侧网元为移动性管理实体(MME ) , 所述发送模 块是设置为釆用以下方式将所述获取模块获取到的 AID发送给所述 UE: 所 述发送模块在为所述 UE建立承载过程中,或者在所述 UE附着过程中,或者 在所述 UE请求 PDN连接过程中,将所述获取模块获取到的 AID发送给所述 UE。 较佳地, 所述 EPS网络侧网元为 P-GW, 所述发送模块是设置为釆用以 下方式将所述获取模块获取到的 AID发送给所述 UE: 所述发送模块在所述 UE附着过程中, 或者在所述 UE请求 PDN连接过程中, 将所述获取模块获 取到的 AID发送给所述 UE。
较佳地, 所述 EPS网络侧网元为 S-GW, 所述发送模块是设置为釆用以 下方式将所述获取模块获取到的 AID发送给所述 UE: 所述发送模块在所述 UE附着过程中, 或者在所述 UE请求 PDN连接过程中, 将所述获取模块获 取到的 AID发送给所述 UE。
较佳地, 所述 EPS 网络侧网元还包括路由标识(RID )分配模块和第三 发送模块,其中:所述 RID分配模块,设置为在本网元确定了 UE附着的 P-GW 之后, 为所述 UE分配 RID , 所述 RID为指向所述 P-GW的 IPv6地址的子网 前缀; 所述第三发送模块, 设置为将所述 UE的 RID发送至所述 ILR, 由所 述 ILR保存所述 UE的 AID至 RID的映射关系。
本发明实施例提供一种终端, 为本终端配置的 IPv6地址能够减少数据传 输时的骨干网资源消耗。
本发明实施例提供的一种终端(UE ) , 包括接收模块和配置模块, 其中: 所述接收模块, 设置为接收 EPS 网络侧网元发送的本 UE 的接入标识 ( AID ) , 以及用于接收本 UE附着的 P-GW分配的子网前缀;
所述配置模块,设置为将所述 AID作为 IPv6地址的接口标识部分, 所述 子网前缀作为所述 IPv6地址的子网前缀部分, 组合成 IPv6地址, 使用所述 IPv6地址配置 UE自身的 IPv6地址。
较佳地,所述配置模块是设置为釆用以下方式将所述 AID作为 IPv6地址 的接口标识部分: 将所述 AID作为 IPv6地址的接口标识部分的一部分, 并生 成所述接口标识部分的另一部分, 将所述两个部分组合成所述 IPv6地址的接 口标识部分。
较佳地, 所述终端还包括发送模块, 其设置为在本 UE向对端 (CN )发 述 CN的 AID作为所述数据报文的目的地址的接口标识部分。
釆用本发明实施例所述方法、 网元或终端, 在终端与对端进行数据传输 时, 无需对数据报文进行隧道封装, 减少骨干网的资源消耗, 降低骨干网成 本。 附图概述
图 1为相关 EPS系统架构示意图;
图 2为基于身份与位置分离的网络架构图;
图 3为 RID和 AID组成一个完整的 IPv6地址的示意图;
图 4为本发明实施例终端间互通流程图;
图 5为本发明第 1实施例流程图;
图 6为本发明第 2实施例流程图;
图 7为本发明第 3实施例流程图;
图 8为本发明第 4实施例流程图;
图 9为本发明第 5实施例结构示意图。 本发明的较佳实施方式
IPv6是 IETF (互联网工程任务组, Internet Engineering Task Force )设计 的用于替代现行版本 IP协议( IPv4 )的下一代 IP协议。 全局 IPv6单播地址 ( 128位) 由两个逻辑部分组成: 一个子网前缀( Subnet Prefix )和一个接口 ID ( Interface Identifier ) 。 由前 N位(如前 64位) 的子网前缀寻址到主机所 在局域网络, 后 128-N位 (如后 64位 ) 的接口 ID定位至具体的主机接口。
如上文所述, 可以将基于身份位置分离原理的移动性管理技术应用到 EPS中。此时, P-GW具有上述 ASR的功能, 同时还需要在 EPS核心网( Core Network )内部署 ILR。 本文提出了一种方法: 利用 IPv6由子网前缀和接口标 识两部分组成的特征, 让终端的 AID釆用上述接口标识的形式(格式) , 而 让终端的 RID釆用上述子网前缀的形式(格式) , 将该 AID和 RID组合成 IPv6地址,使用该 IPv6地址配置 UE自身的 IPv6地址, 由此使得终端的身份 标识和位置标识能被同一个 IPv6地址携带, 以解决现有技术中依赖于隧道封 装实现身份位置分离时而导致的增加骨干网 (核心网) 的开销问题。
以下均以子网前缀为 64位( 128位 IPv6地址的前 64位)、接口 ID也为
64位( 128位 IPv6地址的后 64位)为例子进行说明: 当终端 (又可称之为 UE , User Equipment ) 附着到网络上时 , 网络侧的网元为终端分配一个位置 标识 RID, 该 RID以一个子网前缀的形式出现(例如是 128位 IPv6地址的前 64位) 。 依据该 RID (子网前缀) , 骨干网中其它路由器可以定位到 UE附 着的 ASR; 每个终端还要配置有一个 AID, 该 AID—般是终端用户在运营商 签约开户时确定,且为不变的唯一的标识,但该 AID与现有技术使用 IPv6(应 用在 IPv6环境中)地址的格式来表达不同, 是使用 IPv6地址的接口标识(接 口 ID )部分的格式来表达(例如是 128位 IPv6地址的后 64位) 。 如图 3所 示, 上述 RID以及 AID可以组成一个完整的 IPv6地址。
图 4所示为 UE与其对端 ( Correspondent Node , CN )之间互通的流程, 该 UE的对端可以是另一个 UE, 也可以是网络中的其它实体(例如, 服务器 等) , 具体包括以下步骤:
步骤 401 : UE的对端 (CN ) 向 UE发送数据报文, 首先需要组装 IPv6 数据包, 并填写该 IPv6报文的目的地址(该目的地址是 UE的 IPv6地址)以 及源地址(该源地址是 CN的 IPv6地址 ) ;
其中, 目的地址的后 64位(接口 ID )填写 UE的 AID (即, 将 UE的 AID作为目的地址的接口标识), 也就是说, 填写的目的地址并不一定是 UE 当前配置的 IPv6地址,但该目的地址中的接口 ID部分必须是 UE的 AID; 而 前 64位(子网前缀)任意, 例如可以为运营商指定的一个固定值。 优选地, CN可以从 DNS中通过 UE的域名 ( Domain Name )来查询到 UE的 AID。
源地址填写 CN入网时, 网络给 CN配置的 IPv6地址, 其中该地址的后 64位(接口 ID )为 CN自己的 AID, 前 64位(子网前缀)为网络为 CN分 配的子网前缀;
需要说明的是, 由于对于终端而言, RID仅在 ASR ( P-GW )上, 不需 要下到 UE。 因此此处并不限定 UE或 CN的 IPv6地址的子网前缀部分的值, 可以不是 UE或 CN的 RID。
步骤 402: CN将上述数据报文发送至 CN连接的 ASR ( P-GW ) , 下文 中将该 ASR称之为 ASR-CN;
步骤 403-404: ASR-CN向 ILR查询 UE的位置标识: ASR-CN将 UE的
AID发送至 ILR, ILR向 ASR-CN返回 UE的 RID, ASR-CN得到 UE的 RID 后重新组装上述 IPv6报文,具体地, ASR-CN替换上述 IPv6报文的目的地址, 将其前 64位(子网前缀 )替换成 UE的 RID, 当然该 IPv6地址的后 64位仍 然是 UE的 AID, 此时, 该目的地址中同时携带有 UE的位置标识 RID和身 份标识 AID;
步骤 405: ASR-CN将重新组装的 IPv6报文发至骨干网, 依赖于该 IPv6 报文的子网前缀(前 64位, 也即 UE的 RID ) , 骨干网中的 CR按 IPv6的路 由机制可以将该报文路由到 UE附着的 ASR ( P-GW ) , 下文中将该 ASR称 之为 ASR-UE;
这里所说的骨干网, 是区别与 UE至 ASR-CN之间的接入网而言的, 实 际上该骨干网就是一个 IP 网络, 又可称之为包数据网络 (Packet Data Network, PDN ) 。
步骤 406-407: ASR-UE根据收到的 IPv6数据 4艮文的后 64位, 即 UE的 AID, 确定该报文的最后接收者, 并将该报文发送下去;
值得说明的是, ASR-UE在将收到的上述 IPv6数据报文,将其发送至 UE 之前, 优选还需要检查该 IPv6数据报文的目的地址的子网前缀(即前 64位, UE的 RID ) , 具体如下: 若 ASR-UE判断该子网前缀就是 UE入网时网络为 UE 分配的前缀, 则 ASR-UE将上述数据报文直接发送下去; 若不是, 则 ASR-UE还需要替换上述 IPv6数据报文的目的地址, 将目的地址的子网前缀 替换为 UE入网时网络为 UE分配的子网前缀(维持后 64位, 即 UE的 AID , 不变) , 然后再将该数据报文发送下去。
以下以一个具体的例子说明上述流程: 假设 UE的 AID为 0x1234 0000 0000 0000, UE入网即接入到移动通信网络, 附着到 ASR-UE ( P-GW ) 时, ASR-UE为 UE分配的子网前缀是 OxAAAA 0000 0000 0000,而网络为 UE分 配的 RID是 OxBBBB 0000 0000 0000,此时 UE将自己的 AID作为自己的 IPv6 地址的接口标识, 则 UE的 IPv6地址是 Ox AAAA 0000 0000 0000 1234 0000 0000 0000 (即子网前缀 +接口标识) 。
当 CN向 UE发送 IPv6数据报文时, CN需要填写将该报文的目的地址, 例如填写为 Ox CCCC 0000 0000 0000 1234 0000 0000 0000, 即子网前缀部分 可以任意填写, 而接口 ID部分必须填写为 UE的 AID。
当 ASR-CN收到上述报文时,需要到 ILR依据 UE的 AID查询 UE的 RID, 此时, ASR-CN获知 UE的 RID为 OxBBBB 0000 0000 0000。 ASR-CN将上述 IPv6数据 4艮文的目的地址替换为 Ox BBBB 0000 0000 0000 1234 0000 0000 0000 (即 UE的 RID+AID )。 依赖该地址的子网前缀, 该 IPv6路由机制可以 保证该数据报文被路由到上述 ASR-UE上。
ASR-UE再检查该 IPv6数据报文, 发现其目的地址的子网前缀(即 UE 的 RID )不为 UE入网时为 UE分配的子网前缀, 则再次替换 ^艮文的目的地址 为 Ox AAAA 0000 0000 0000 1234 0000 0000 0000, 最后将该数据 4艮文发送至 UE。 UE发现自己的 IPv6地址等于该报文的目的地址, 于是接收并处理该报 文。 由此可见, 在上述 IPv6数据报文从 CN发送到 UE的过程中, 其目的地 址的接口 ID ( UE的 AID )部分始终不变。
具体地, ASR-UE通过无线接入网, 例如通过 S-GW、 eNodeB等网元将 ^艮文发送到 UE。
通过上述方法, 可以不用使用隧道封装的方式即可实现基于身份位置分 离原理的移动性管理, 故可以解决上述骨干网资源消耗的问题。
由上例可见, UE的 AID是 IPv6地址的接口 ID部分(例如后 64位) , 则 UE的 IPv6地址的接口 ID部分必须是固定和唯一的。下面通过几个实施例 介绍 UE如何获取该 AID。
值得说明的是, 以上描述的是 CN向 UE发送报文的过程, 实际上 UE向 CN发送 IPv6数据 ^艮文的过程与此同理, 只不过将上述过程中的 CN和 UE 相互替换, 其原理相同, 不再赘述。 为使本发明的目的、 技术方案和优点更加清楚明白, 下文中将结合附图 对本发明的实施例进行详细说明。 需要说明的是, 在不冲突的情况下, 本申 请中的实施例及实施例中的特征可以相互任意组合。
实施例一
本实施例提供了一种 EPS中在为 UE建立承载时为 UE配置其身份标识 AID的方法, 如图 5所示, 具体包含以下步骤:
步骤 501: MME发起为 UE建立承载, 如建立默认承载( default bearer ) 前 , MME先到 ILR去获取 UE的 AID;
MME可以主动发起为 UE建立承载, 也可以基于其它条件触发, 这不是 本发明研究的重点, 不应构成对本发明的限制。
MME到 ILR去获取 UE的 AID , 具体地 , MME向 ILR发送请求消息 , 其中携带 UE用于鉴权认证的标识, 例如国际移动用户识别码( International Mobile Subscriber Identification Number, IMSI ); ILR在本地依据上述标识查 找 UE的 AID, 并将之返回给 MME。
如上文所述, 终端用户的 AID由其签约指定, 那么在用户与运营商签约 时,运营商可以为用户分配 AID,并将之保存在 ILR中。 当然,也可以将 AID 保存在鉴权认证服务器中,如鉴权认证计费(Authentication, Authorization and Accounting, 简称为 AAA )服务器、归属用户服务器( Home Subscriber Server, HSS ) 、 归属位置寄存器( Home Location Register, HLR )等, 那么此时或 者在 UE附着时 MME可以从鉴权认证服务器获取 (如, 在获取 UE的签约信 息时获取) 。
值得说明的是,本实施例中所述的 AID并不是一个完整的 IPv6地址, 而 是 IPv6地址的接口标识部分, 例如 128位 IPv6地址的后 64位。 且该接口标 识是全局唯一的标识, 即一个接口标识不会分给两个 UE使用。
步骤 502: MME向 UE发送消息, 其中携带上述获取到的 UE的 AID; 值得说明的是, 若终端用户与运营商签约时, 签约了多个 AID, 则在步 骤 501中, MME可以获取到该用户的多个 AID, 则在本步骤中, 可以将这些 AID—同发送给 UE。
具体地, MME可以将上述 UE的 AID携带在激活默认 EPS承载上下文 送给 UE, 优选还携带指示, 以告知 UE该参数是 UE的 AID。
步骤 503: 收到上述消息以后, UE将其中携带的 AID (—个或者多个) 保存在本地, 并标记其为 UE自身的身份标识 AID, 同时, 向 MME返回应答 消息, 如返回激活默认 EPS 载上下文接受 (ACTIVATE DEFAULT EPS BEARER CONTEXT Accept ) 消息, 用作确认;
步骤 504: 在后续任意时刻, UE想获取自己的 IP地址时, 会向当前为 UE服务的 P-GW发送路由信息请求( Router Solicitation ) 消息;
步骤 505: 基于上述的路由信息请求消息, P-GW向 UE发送路由信息广 播( Router Advertisement ) 消息, 其中携带 P-GW为 UE分配的 IPv6地址的 子网前缀;
值得说明的是, 路由信息广播消息也可以由 P-GW主动向 UE发送, 而 不依赖于收到 UE发送的路由信息请求消息。
另夕卜, 在本步骤中, P-GW还可为 UE分配 RID, 如上文所述该 RID是 IPv6的子网前缀部分。 P-GW可以将该 RID携带在上述路由信息广播消息中 发送给 UE。 当然, P-GW也可以将另一个不同于其为 UE分配的 RID的子网 前缀发送给 UE。
步骤 506: 由上述步骤可知, 此时 UE获取到了自己的 AID, 以及 P-GW 分配的子网前缀,则 UE可以将两部分信息拼接(例如,按图 3所示的方式), 构成一个或多个完整的 IPv6地址, 这个(这些 ) IPv6的接口标识部分(如, 后 64位)是该 UE的 AID;
考虑具体的 EPS网络, 值得说明的是, 在步骤 502中, 可以扩展上述激 活默认 EPS承载上下文请求消息的 PDN address字段,在其中增加上述的 AID 以及指示; 或者在激活默认 EPS承载上下文请求消息中增加新的字段, 携带 上述 AID以及指示。
通过上述实施例, 可以使 UE在生成自己的 IPv6地址时, 保证其 IPv6地 址的接口标识部分是该 UE的 AID。
实施例二
本实施例是 EPS中 UE附着过程中为终端 UE配置其身份标识 AID的另 一种方法, 如图 6所示, 具体包含以下步骤:
步骤 601: UE通过无线接入网向 MME发送附着请求( Attach Request ) 消息, 发起 UE初始附着流程;
步骤 602: 可选地, UE与 MME以及 HSS执行鉴权过程;
步骤 603: MME向 S-GW发送创建会话请求(Create Session Request ) 消息;
步骤 604: S-GW向 P-GW发送创建会话请求消息,收到该消息以后, P-GW 为 UE创建会话, 例如为 UE创建 PDN上下文;
步骤 605: P-GW还要去获取 UE的 AID, 如, P-GW向 ILR发送请求, 携带 UE用于鉴权认证的标识(如 IMSI ) , ILR向 P-GW返回该 UE的 AID; 优选地,若 ILR中保存有 UE多个 AID,则向 P-GW返回多个 UE的 AID, 如上文所述, P-GW也可以从鉴权认证服务器(如 AAA、 HSS或 HLR等)去 获取 UE的 AID。
步骤 606: P-GW向 S-GW返回创建会话应答 ( Create Session Response ) 消息, 其中携带上述获取到的 UE的一个或者多个 AID, 以及优选还携带一 个指示, 以说明其是 UE的 AID, 这里所述的 UE的 AID, 形式上是 IPv6地 址的接口标识部分 (如, IPv6地址的后 64位) ;
优选地,可以扩展上述创建会话应答消息中的 PDN Address Allocation字 段, 以携带上述 UE的 AID以及指示; 或者, 在创建会话应答消息中增加新 的字段以携带 UE的 AID。
步骤 607: S-GW向 MME返回创建会话应答消息,如上述的方法, S-GW 将 UE的 AID发送给 MME;
步骤 608: MME通过接入网向 UE发送附着接受( Attach Accept )消息, 其中携带上述 UE的 AID, 以及优选还携带上述的指示;
在步骤 606-608中, P-GW在获取到 UE的 AID以后,也可以将之放在参 数协议配置选项( Protocol Configuration Option, PCO )参数中发送给 UE。 该 参数是用于 P-GW与 UE之间传递相关信息的参数, 对于 S-GW、 MME等中 间网元来说都只是透传该参数。 则, P-GW可以将获取到的 UE的 AID放在 该 PCO中, 首先发送给 S-GW (如, 使用上述创建会话响应消息) , 再发送 给 MME, 由 MME发送给 UE后, UE从 PCO中取出自己的 AID (—个或者 多个) , 然后保存在本地。
步骤 609-611 : 同步骤 504-506。
作为对本实施例方法的一种变形方法, UE的 AID也可以由 S-GW去获 取, 例如在 S-GW收到 MME发送的创建会话请求消息, 或者收到 P-GW发 送的创建会话响应消息时, 向 ILR或者鉴权认证服务器请求 UE的 AID。 这 样,就无需 P-GW去获取 UE的 AID,而仅需要在步骤 607中, S-GW向 MME 返回创建会话应答消息中携带 UE的 AID即可。
作为对本实施例方法的另一种变形方法, 也可以由 MME去获取 UE的
AID, 例如在 MME收到 UE发送附着请求, 或者收到 S-GW返回的创建会话 应答消息时, 向 ILR或者鉴权认证服务器请求 UE的 AID。
进一步地, 在上述变形方法中, 当 S-GW或 MME获取到 UE的 AID以 后, 还需要将该 AID发送给 UE的 P-GW。 例如将之携带在创建会话请求中 发送给 P-GW。 无论釆用哪种获取 UE的 AID的方法, P-GW都能获取到 UE 的 AID, 并将之保存在本地。
在获取到 UE的 AID之后 ,还需要为 UE分配 RID, 该 RID如上文所述, 是一个子网前缀, 且指向 UE附着的 P-GW (如 IPv6地址的前 64位) , 例如 该 RID就是 P-GW本身 IPv6地址的子网前缀部分, 具体包括:
方法一: UE附着的 P-GW来分配,例如在收到步骤 604的创建会话请求 消息时, P-GW为 UE分配 RID,或者在步骤 605从 ILR获取到 UE的 AID以 后为 UE分配 RID。 或者, 同步骤 505所述方法, 在步骤 610中为 UE分配 RID。
方法二: UE当前的 S-GW来分配,例如在收到步骤 603的创建会话请求 时, 在确定了 UE附着的 P-GW之后 (如, S-GW为 UE选择一个 P-GW, 或 者 MME为 UE选择一个 P-GW后将选择的 P-GW通知给 S-GW ) ,使用一个 指向该 P-GW的地址的子网前缀作为 UE的 RID , 优选就选择 P-GW的 IPv6 地址的子网前缀作为 UE的 RID; S-GW也可以在收到步骤 606的创建会话应 答消息时再给 UE分配 RID, 此时 UE附着的 P-GW已经确定。
方法三: UE当前的 MME来分配, 例如收到步骤 601的附着请求(优选 在通过鉴权认证后) , 确定了 UE附着的 P-GW之后 (如, MME为 UE选择 一个 P-GW ) , 使用一个指向该 P-GW的地址的子网前缀作为 UE的 RID, 优 选就选择 P-GW的 IPv6地址的子网前缀作为 UE的 RID; MME也可以在收 到步骤 607创建会话应答后再给 UE分配 RID,此时 UE附着的 P-GW已经确 定。
使用上述的方法, 在 P-GW或 S-GW或 MME为 UE分配了 RID之后, 还需要将 RID通知给 ILR,以使 ILR保存有该 UE的 AID至 RID的映射关系。 可以由 P-GW或 S-GW或 MME向 ILR发送消息, 携带 UE的 RID以及 UE 的 AID或者 UE的用于鉴权认证的标识(如 IMSI )。 值得说明是, 向 ILR通 知 UE的 RID不一定由分配 UE的 RID的实体来执行。 例如, 可以由 MME 为 UE分配 RID, 但是由 P-GW来通知 ILR, 只要 MME将分配好的 RID通 知给 P-GW (如, 通过步骤 603、 604的创建会话请求消息) 即可。 也就是说 获取 RID和发送 RID可以在同一个或者不同的过程中,获取 RID的网元和发 送 RID的网元和可以相同或不同。 同样地, 对于 AID, 网络侧网元获取 AID 和将 AID发送给 UE可以在同一个流程中或者在不同的流程中实现,获取 AID 的网元和向 UE发送 AID的网元也可以相同或不同。
上述的方法是在获取到 UE的 AID之后,再为 UE分配 RID ,并将该 RID 发送至 ILR的。实际上,在获取 UE的 AID之前,只要确定了 UE附着的 P-GW, 即可为 UE分配 RID。 这样可以在向 ILR请求 UE的 AID的同时, 将已经分 配好的 RID发送给 ILR。 实施例三
本实施例是在 EPS中为 UE配置其身份标识 AID的另一种方法, 如图 7 所示, 具体包含以下步骤: 步骤 701: UE向 MME发送 PDN连接请求( PDN Connectivity Request ) 消息, 以请求 PDN连接;
步骤 702-706: 同步骤 603-607;
步骤 707: MME向 UE发送 PDN连接接受 ( PDN Connectivity Accept ) 消息, 其中携带 UE的 AID, 以及优选携带指示该参数为 UE的 AID的指示; 步骤 708-710: 同步骤 504-506。
实施例四
本实施例描述删除 RID的方法, 当 UE释放其 IP地址时, 需要删除 ILR 保存的 UE的位置标识 RID, 如图 8所示, 具体包括以下步骤:
步骤 801 :当 UE要断开其 PDN连接时,向 MME发送 PDN断链请求( PDN Disconnection Request ) 消息;
步骤 802: MME向 S-GW发送删除会话请求(Delete Session Request ) 消息;
本流程也可以从本步骤开始执行,对应为 MME发起的断开 PDN连接的 场景。
步骤 803: S-GW向 P-GW发送删除会话请求( Delete Session Request ) 消息;
步骤 804: P-GW向 ILR发送消息删除位置标识, 携带 UE的 RID以及 UE用于鉴权认证的标识(如 IMSI )或 UE的 AID;
优选地, 若该 UE有多条活跃的 PND连接, 在 P-GW可以判断在 UE删 除最后一个活跃的 PDN连接时, 才向身份位置寄存器发送上述的消息。
步骤 δθ5: P-GW向 S-GW返回删除会话响应 ( Delete Session Response ) 消息; 步骤 806: S-GW向 MME返回删除会话响应 ( Delete Session Response ) 消息;
步骤 807-810 : MME 向无线接入网 (如, 基站)发送承载去活请求 ( Deactivate Bearer Request ) 消息; 无线接入网向 UE发送 RRC连接重配置 ( RRC Connection Reconfiguration )消息; UE向无线接入网返回 RRC连接重 配置完成响应; 无线接入网向 MME返回 7 载去活响应。
步骤 811 : PDN连接删除的后续步骤。
当然作为本实施例方法的一种变形方法, MME以及 S-GW也可以在流程 中向 ILR发起请求用以删除 ILR保存的 UE的 RID。 例如 MME在收到步骤 801的 PDN断链请求, 或收到步骤 806的删除会话响应, 或收到步骤 810的 承载去活响应时, 向 ILR发起请求, 携带 UE的用以鉴权认证的标识(如, IMSI ) , 或者携带 UE的 AID, 以及优选还携带 UE的 RID, 用以删除 ILR 保存的 UE的 RID信息。 又例如 S-GW在收到步骤 802的删除会话请求, 或 步骤 805的删除会话响应时, 向 ILR发起请求, 携带 UE的用以鉴权认证的 标识(如, IMSI ) , 或者携带 UE的 AID, 以及优选还携带 UE的 RID, 用以 删除 ILR保存的 UE的 RID信息。
需要强调的是,上述各实施例提供的方法,使得网络侧网元(如, P-GW、 S-GW, MME ) 能将 UE的 AID发送给 UE, 其中 UE的 AID是 IPv6地址中 的接口 ID部分。基于上述的原理,作为一种变形,实际上也可以釆用上述 IPv6 地址的接口标识的一部分来作为 UE的 AID。 具体来说, 在上述的实施例中 , 4叚定接口 ID部分为完整的 IPv6地址的后 64位, 并将该后 64位作为 UE的 AID。 那么在这里所述的变形方法中, 可以将这后 64位中的例如前 48位作 为 UE的 AID。 这样, 使用本实施例的上述方法, 网络侧同样可以将 UE的 AID发送给 UE, 只不过该 AID仅是 IPv6地址的接口 ID部分的一部分而已。 那么 UE在配置自己的 IPv6地址时, 除了需要从 P-GW获取到自己的子网前 缀以外, 还需要生成接口 ID。 此时, 由于 UE已经获得到自己的 AID, 其为 接口 ID的一部分, 则 UE只需要自己生成接口 ID的另一部分(如, 随机生 成)即可。 例如, 在上述例子中, AID是 48位的, 则 UE再随机生成一个 16 位的数字, 与 AID组合成 64位的接口 ID即可。
众所周知的, 在现有的 3GPP ( The 3rd Generation Partnership Project ) 关于 EPS的规范中, UE获取自己的 IPv6地址的一般方式是由 P-GW向其通 告一个 IPv6的 64位子网前缀, 然后由 UE自行配置后 64位的接口 ID部分, 以构成一个完整的 IPv6地址, 也就是说 UE的 IPv6的接口 ID部分不由网络 指定。
但是即使不在 EPS中应用基于身份位置分离原理的移动性管理技术, 当 EPS需要为 UE指定 UE使用的接口 ID时, 仍然可以使用上述实施例中的方 法来实现。 只不过这里的接口 ID 没有上述身份标识的含义, 以及无需部署 ILR。
此时, 网络侧(如上述的 MME、 P-GW, S-GW )也不必向 ILR获取 UE 的接口标识, 而只需本地分配或者从 UE的签约信息中获取需要分配给该 UE 的接口 ID , 再使用上述发送 UE的 AID到 UE的方法, 将该接口标识发送给 UE即可。 这样, 可以达到 EPS为 UE分配一个确定的 IPv6地址的目的。
实施例五
本实施例提供一种实现上述方法的 EPS网络侧网元, 如图 9所示, 包括 获取模块和第一发送模块, 其中:
所述获取模块, 设置为获取 UE的 AID;
所述第一发送模块, 设置为将所述获取模块获取到的 AID发送给所述
UE。
优选地, 该 EPS网络侧网元包括以下任意之一: MME、 P-GW, S-GW。 当该 EPS网络侧网元为 UE附着的 P-GW时, 该 P-GW还包括子网前缀 分配模块和第二发送模块, 其中: 所述子网前缀分配模块, 设置为为 UE分 配子网前缀; 所述第二发送模块, 设置为将所述分配模块分配的子网前缀发 送给所述 UE。
优选地, 该 EPS网络侧网元为 UE附着的 P-GW时, 所述 P-GW还包括 替换模块, 其设置为: 在接收到所述 UE发送的数据报文后, 查询获得所述 UE对端 ( CN ) 的 RID, 使用所述 RID替换所述数据报文的目的地址的子网 前缀部分后, 将所述数据报文发送至 IP网。 优选地, 在接收到发往 UE的数 据报文的目的地址的子网前缀与之前分给 UE的前缀不同时, 该替换模块还 用于在收到发往所述 UE的数据报文时, 将所述数据报文目的地址的子网前 缀替换为本 P-GW为所述 UE分配的子网前缀, 再将所述数据报文发送给所 述 UE。
优选地, 该获取模块是设置为釆用以下方式获取 UE的 AID: 所述获取 模块依据所述 UE的国际移动用户识别码( IMSI )查询身份位置寄存器( ILR ) 或者鉴权认证服务器,获取所述 UE的所述 AID;或者,本地分配 UE的 AID; 或者, 从 UE的签约信息中获取所述 UE的 AID。
具体地, 该 EPS网络侧网元为 MME, 所述发送模块是设置为釆用以下 方式将所述获取模块获取到的 AID发送给所述 UE: 发送模块在为所述 UE 建立承载过程中, 或者在所述 UE附着过程中, 或者在所述 UE请求 PDN连 接过程中, 将获取模块获取到的 AID发送给所述 UE。
具体地, 该 EPS网络侧网元为 P-GW, 所述发送模块是设置为釆用以下 方式将所述获取模块获取到的 AID发送给所述 UE:发送模块在所述 UE附着 过程中, 或者在所述 UE请求 PDN连接过程中, 将获取模块获取到的 AID发 送给所述 UE。
具体地, 该 EPS网络侧网元为 S-GW, 所述发送模块是设置为釆用以下 方式将所述获取模块获取到的 AID发送给所述 UE:发送模块在所述 UE附着 过程中, 或者在所述 UE请求 PDN连接过程中, 将所述获取模块获取到的 AID发送给所述 UE。
优选地, 该 EPS 网络侧网元还包括路由标识(RID )分配模块和第三发 送模块, 其中: 该 RID分配模块, 设置为在本网元确定了 UE附着的 P-GW之后, 为所 述 UE分配 RID , 所述 RID为指向所述 P-GW的 IPv6地址的子网前缀;
该第三发送模块,设置为将所述 UE的 RID发送至所述 ILR, 由所述 ILR 保存所述 UE的 AID至 RID的映射关系。 实施例六
实现上述方法的 UE, 如图 9所示, 包括接收模块和配置模块, 其中: 该接收模块, 设置为接收 EPS网络侧网元发送的本 UE的 AID , 以及用 于接收本 UE附着的 P-GW分配的子网前缀;
该配置模块,设置为将所述 AID作为 IPv6地址的接口标识部分, 所述子 网前缀作为所述 IPv6地址的子网前缀部分,组合成 IPv6地址,使用所述 IPv6 地址配置 UE自身的 IPv6地址。
优选地,该配置模块可以釆用以下方式将所述 AID作为 IPv6地址的接口 标识部分:
将所述 AID作为 IPv6地址的接口标识部分的一部分,并生成所述接口标 识部分的另一部分, 将所述两个部分组合成所述 IPv6地址的接口标识部分。
优选地, 所述 UE还包括发送模块, 其设置为在本 UE向对端 (CN )发 述 CN的 AID作为所述数据 文的目的地址的接口标识部分。
本领域普通技术人员可以理解上述方法中的全部或部分步骤可通过程序 来指令相关硬件完成, 所述程序可以存储于计算机可读存储介质中, 如只读 存储器、 磁盘或光盘等。 可选地, 上述实施例的全部或部分步骤也可以使用 一个或多个集成电路来实现。 相应地, 上述实施例中的各模块 /单元可以釆用 硬件的形式实现, 也可以釆用软件功能模块的形式实现。 本发明不限制于任 何特定形式的硬件和软件的结合。
当然, 本发明还可有其他多种实施例, 在不背离本发明精神及其实质的 但这些相应的改变和变形都应属于本发明所附的权利要求的保护范围。
工业实用性
釆用本发明实施例所述方法、网元或 UE,在 UE与对端进行数据传输时, 无需对数据报文进行隧道封装, 减少骨干网的资源消耗, 降低骨干网成本。

Claims

权 利 要 求 书
1、 一种实现身份位置分离网络的方法, 所述方法适用于应用身份位置分 离技术的演进的分组系统(EPS ) 网络中, 所述方法包括:
EPS 网络侧网元获取用户设备 ( UE ) 的接入标识(AID ) , 并将所述获 取到的 AID发送给所述 UE;
所述 UE附着的分组数据网络网关 (P-GW )为 UE分配子网前缀, 并将 该子网前缀发送给所述 UE;
所述 UE将所述 AID作为 IPv6地址的接口标识部分,所述子网前缀作为 所述 IPv6地址的子网前缀部分, 组合成 IPv6地址, 使用所述 IPv6地址配置 UE自身的 IPv6地址。
2、 如权利要求 1所述的方法, 其中:
所述 EPS网络侧网元获取 UE的 AID , 包括:
所述 EPS网络侧网元依据所述 UE的国际移动用户识别码( IMSI )查询 身份位置寄存器(ILR )或者鉴权认证服务器, 获取所述 UE的所述 AID。
3、 如权利要求 2所述的方法, 其中:
所述鉴权认证服务器包括以下服务器中的任意一种: 鉴权认证计费 ( AAA )服务器、 归属位置寄存器、 归属用户服务器。
4、 如权利要求 1或 2或 3所述的方法, 其中:
所述 EPS 网络侧网元包括以下任意之一: 移动性管理实体(MME ) 、 P-GW、 服务网关 (S-GW ) 。
5、 如权利要求 1或 2或 3所述的方法, 所述方法还包括:
所述 UE向其对端( CN )发送数据^艮文时, 将所述组合成的 IPv6地址作 的接口标识部分;
所述 UE附着的 P-GW接收到所述 UE发送的数据报文后,查询获得所述
CN的 RID, 使用所述 RID替换所述数据报文的目的地址的子网前缀部分后, 将所述数据报文发送至 IP网。
6、 如权利要求 1或 2或 3所述的方法, 所述方法还包括: 所述 UE附着的 P-GW收到发往所述 UE的数据报文时, 所述 P-GW将 所述数据报文目的地址的子网前缀替换为所述 P-GW为所述 UE分配的子网 前缀, 并将所述数据报文发送给所述 UE。
7、 如权利要求 1或 2或 3所述的方法, 其中:
所述 EPS网络侧网元为移动性管理实体(MME ) , 所述 MME将获取到 的 AID发送给所述 UE, 包括:
所述 MME在为所述 UE建立承载过程中,或者所述 MME在所述 UE附 着过程中 ,或者所述 MME在所述 UE请求 PDN连接过程中 ,将获取到的 AID 发送给所述 UE。
8、 如权利要求 7所述的方法, 其中:
所述 MME在为 UE建立承载过程中,将获取到的 AID发送给 UE,包括: 所述 MME在为所述 UE建立承载过程中,将所述 MME在为终端建立承 载前依据所述 UE的 IMSI查询 ILR或者鉴权认证服务器获取到的所述 UE的 AID, 携带在激活默认 EPS承载上下文请求消息中发送给 UE。
9、 如权利要求 7所述的方法, 其中:
所述 MME在 UE附着过程中, 将获取到的 AID发送给 UE, 包括: 在接收到 UE发送的附着请求或者在接收到服务网关( S-GW )返回的创 建会话应答消息时,依据所述 UE的 IMSI查询 ILR或者鉴权认证服务器获取 所述 UE的 AID, 将所述获取到的 UE的 AID携带在附着接受消息中发送给 UE。
10、 如权利要求 7所述的方法, 其中:
所述 MME在 UE请求 PDN连接过程中 , 将获取到的 AID发送给 UE, 包括:
所述 MME在接收到 UE发送的 PDN连接请求消息或者在接收到 S-GW 返回的创建会话应答消息时,依据所述 UE的 IMSI查询 ILR或者鉴权认证服 务器获取所述 UE的 AID , 将所述获取到的 UE的 AID携带在 PDN连接接受 消息中发送给 UE。
11、 如权利要求 1或 2或 3所述的方法, 其中:
所述 EPS网络侧网元为 P-GW, 所述 P-GW将获取到的 AID发送给所述 UE, 包括:
所述 P-GW在所述 UE附着过程中,或者所述 P-GW在所述 UE请求 PDN 连接过程中, 将所述获取到的 AID发送给所述 UE。
12、 如权利要求 1或 2或 3所述的方法, 其中:
所述 EPS网络侧网元为 P-GW , 所述 EPS网络侧网元获取 UE的 AID , 并将所述获取到的 AID发送给所述 UE, 包括:
所述 P-GW在所述 UE附着过程中, 或者在所述 UE请求 PDN连接过程 中,所述 P-GW在接收到创建会话请求消息时,依据所述 UE的 IMSI查询 ILR 或鉴权认证服务器获取所述 UE的 AID, 在向 S-GW返回的创建会话应答消 息中携带所述 UE的 AID, 通过 S-GW、 MME将所述 AID发送给 UE。
13、 如权利要求 1或 2或 3所述的方法, 其中:
所述网络侧网元为 S-GW , 所述 S-GW将获取到的 AID发送给所述 UE , 包括:
所述 S-GW在所述 UE附着过程中,或者所述 S-GW在所述 UE请求 PDN 连接过程中, 将所述获取到的 AID发送给所述 UE。
14、 如权利要求 1或 2或 3所述的方法, 其中:
所述 EPS网络侧网元为 S-GW , 所述 EPS网络侧网元获取 UE的 AID , 并将所述获取到的 AID发送给所述 UE, 包括:
所述 S-GW在所述 UE附着过程中, 或者在所述 UE请求 PDN连接过程 中,所述 S-GW在接收到 MME发送的创建会话请求消息,或者在接收到 P-GW 发送的创建会话响应消息时,依据所述 UE的 IMSI查询 ILR或鉴权认证服务 器获取所述 UE的 AID, 在向 MME返回的创建会话应答消息中携带所述 UE 的 AID, 通过 MME将所述 AID发送给 UE。
15、 如权利要求 1所述的方法, 所述方法还包括: 在所述 EPS网络侧网元在确定了所述 UE附着的 P-GW之后 ,为所述 UE 分配路由标识( RID ) , 所述 RID为指向所述 P-GW的 IPv6地址的子网前缀; 所述 EPS网络侧网元将所述 UE的 RID发送至所述 ILR, 由所述 ILR保存所 述 UE的 AID至 RID的映射关系。
16、 如权利要求 15所述的方法, 其中:
所述 UE附着的分组数据网络网关 (P-GW )为 UE分配子网前缀包括: 所述 P-GW将 EPS网络侧网元分配给 UE的 RID作为子网前缀分配给 UE。
17、 如权利要求 1所述的方法, 其中:
所述 UE将所述 AID作为 IPv6地址的接口标识部分, 包括:
所述 UE将所述 AID作为 IPv6地址的接口标识部分的一部分,并生成所 述接口标识部分的另一部分, 将所述两个部分组合成所述 IPv6地址的接口标 识部分。
18、 一种演进的分组系统(EPS ) 网络中为用户设备 ( UE )分配接口标 识的方法, 包括:
EPS网络侧网元本地分配或者从 UE的签约信息中获取该 UE的接口标 识, 将获取到的接口标识发送给 UE。
19、 如权利要求 18所述的方法, 其中:
所述 EPS网络侧网元包括以下任意之一: 移动性管理实体(MME )、 分 组数据网络网关 (P-GW ) 、 服务网关 (S-GW ) 。
20、 如权利要求 18或 19所述的方法, 其中:
所述 EPS网络侧网元为移动性管理实体(MME ) , 所述 MME将获取到 的接口标识发送给 UE, 包括:
所述 MME在为所述 UE建立承载过程中,或者所述 MME在所述 UE附 着过程中 , 或者所述 MME在所述 UE请求 PDN连接过程中 , 将获取到的接 口标识发送给所述 UE。
21、 如权利要求 18或 19所述的方法, 其中:
所述 EPS网络侧网元为 P-GW, 所述 P-GW将获取到的接口标识发送给 UE, 包括:
所述 P-GW在所述 UE附着过程中,或者所述 P-GW在所述 UE请求 PDN 连接过程中, 将获取到的接口标识发送给所述 UE。
22、 如权利要求 18或 19所述的方法, 其中:
所述网络侧网元为 S-GW, 所述 S-GW将获取到的接口标识发送给 UE, 包括:
所述 S-GW在所述 UE附着过程中,或者所述 S-GW在所述 UE请求 PDN 连接过程中, 将获取到的接口标识发送给所述 UE。
23、 一种演进的分组系统(EPS ) 网络侧网元, 包括获取模块和第一发 送模块, 其中:
所述获取模块设置为获取用户设备 ( UE ) 的接入标识(AID ) ; 所述第一发送模块设置为将所述获取模块获取到的 AID发送给所述 UE。
24、 如权利要求 23所述的网元, 其中:
所述 EPS网络侧网元包括以下任意之一: 移动性管理实体(MME )、 分 组数据网络网关 (P-GW ) 、 服务网关 (S-GW ) 。
25、 如权利要求 24所述的网元, 其中:
所述 EPS网络侧网元为 UE附着的 P-GW时, 所述 P-GW还包括子网前 缀分配模块和第二发送模块, 其中:
所述子网前缀分配模块设置为为 UE分配子网前缀;
所述第二发送模块设置为将所述分配模块分配的子网前缀发送给所述
UE。
26、 如权利要求 25所述的网元, 其中:
所述 EPS网络侧网元为 UE附着的 P-GW时, 所述 P-GW还包括替换模 块,其用于:在接收到所述 UE发送的数据报文后,查询获得所述 UE对端( CN ) 的 RID, 使用所述 RID替换所述数据报文的目的地址的子网前缀部分后, 将 所述数据报文发送至 IP网。
27、 如权利要求 26所述的网元, 其中: 所述替换模块还用于在收到发往所述 UE的数据报文时, 将所述数据报 文目的地址的子网前缀替换为本 P-GW为所述 UE分配的子网前缀, 再将所 述数据报文发送给所述 UE。
28、 如权利要求 23或 24所述的网元, 其中:
所述获取模块是用于釆用以下方式获取 UE的 AID:
所述获取模块依据所述 UE的国际移动用户识别码(IMSI )查询身份位 置寄存器(ILR )或者鉴权认证服务器, 获取所述 UE的所述 AID; 或者
本地分配 UE的 AID; 或者
从 UE的签约信息中获取所述 UE的 AID。
29、 如权利要求 23或 24所述的网元, 其中:
所述 EPS网络侧网元为移动性管理实体(MME ) , 所述发送模块是用于 釆用以下方式将所述获取模块获取到的 AID发送给所述 UE:
所述发送模块在为所述 UE建立承载过程中,或者在所述 UE附着过程中, 或者在所述 UE请求 PDN连接过程中,将所述获取模块获取到的 AID发送给 所述 UE。
30、 如权利要求 23或 24所述的网元, 其中:
所述 EPS网络侧网元为 P-GW, 所述发送模块是用于釆用以下方式将所 述获取模块获取到的 AID发送给所述 UE:
所述发送模块在所述 UE附着过程中, 或者在所述 UE请求 PDN连接过 程中, 将所述获取模块获取到的 AID发送给所述 UE。
31、 如权利要求 23或 24所述的网元, 其中:
所述 EPS网络侧网元为 S-GW, 所述发送模块是用于釆用以下方式将所 述获取模块获取到的 AID发送给所述 UE:
所述发送模块在所述 UE附着过程中, 或者在所述 UE请求 PDN连接过 程中, 将所述获取模块获取到的 AID发送给所述 UE。
32、 如权利要求 23或 24所述的网元, 其中:
所述 EPS网络侧网元还包括路由标识(RID )分配模块和第三发送模块, 其中:
所述 RID分配模块, 用于在本网元确定了 UE附着的 P-GW之后, 为所 述 UE分配 RID , 所述 RID为指向所述 P-GW的 IPv6地址的子网前缀; 所述第三发送模块,用于将所述 UE的 RID发送至所述 ILR, 由所述 ILR 保存所述 UE的 AID至 RID的映射关系。
33、 一种用户设备(UE ) , 包括接收模块和配置模块, 其中: 所述接收模块设置为: 接收 EPS 网络侧网元发送的本 UE 的接入标识 ( AID ) , 以及接收本 UE附着的 P-GW分配的子网前缀;
所述配置模块设置为: 将所述 AID作为 IPv6地址的接口标识部分, 所述 子网前缀作为所述 IPv6地址的子网前缀部分, 组合成 IPv6地址, 使用所述 IPv6地址配置 UE自身的 IPv6地址。
34、 如权利要求 33所述的终端, 其中:
所述配置模块是设置为釆用以下方式将所述 AID作为 IPv6地址的接口标 识部分:
将所述 AID作为 IPv6地址的接口标识部分的一部分,并生成所述接口标 识部分的另一部分, 将所述两个部分组合成所述 IPv6地址的接口标识部分。
35、 如权利要求 33或 34所述的终端, 其中:
所述终端还包括发送模块, 其设置为在本 UE向对端 (CN )发送数据报 AID作为所述数据报文的目的地址的接口标识部分。
PCT/CN2012/083739 2011-11-15 2012-10-30 实现身份位置分离、分配接口标识的方法及网元和ue WO2013071819A1 (zh)

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