WO2017008252A1 - 一种ip地址分配的方法和装置 - Google Patents

一种ip地址分配的方法和装置 Download PDF

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Publication number
WO2017008252A1
WO2017008252A1 PCT/CN2015/083986 CN2015083986W WO2017008252A1 WO 2017008252 A1 WO2017008252 A1 WO 2017008252A1 CN 2015083986 W CN2015083986 W CN 2015083986W WO 2017008252 A1 WO2017008252 A1 WO 2017008252A1
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WO
WIPO (PCT)
Prior art keywords
address
mobility
request message
attribute
message
Prior art date
Application number
PCT/CN2015/083986
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English (en)
French (fr)
Inventor
李岩
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2015/083986 priority Critical patent/WO2017008252A1/zh
Priority to CN201810241903.7A priority patent/CN108337674B/zh
Priority to CN202010260908.1A priority patent/CN111541792B/zh
Priority to BR112018000736-6A priority patent/BR112018000736A2/zh
Priority to EP15897980.7A priority patent/EP3310080B1/en
Priority to CN201580036700.9A priority patent/CN106664551B/zh
Priority to RU2018105182A priority patent/RU2676533C1/ru
Publication of WO2017008252A1 publication Critical patent/WO2017008252A1/zh
Priority to US15/865,278 priority patent/US10869189B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/26—Network addressing or numbering for mobility support
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/50—Address allocation
    • H04L61/5007—Internet protocol [IP] addresses
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/50—Address allocation
    • H04L61/5007—Internet protocol [IP] addresses
    • H04L61/5014—Internet protocol [IP] addresses using dynamic host configuration protocol [DHCP] or bootstrap protocol [BOOTP]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/12—Setup of transport tunnels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/042—Public Land Mobile systems, e.g. cellular systems

Definitions

  • the present invention relates to the field of communications, and in particular, to a method and apparatus for IP address allocation.
  • the Packet Data Network Gateway allocates IP addresses.
  • the PGW deployment location is high. Take China as an example. Deployed in the provincial capital, so that when the user moves, they can always connect to the PGW to ensure that the user assigns the IP unchanged.
  • users often access local service servers (in China, for example, these servers are located in the local market). If the user is still connected to the PGW, there will be a roundabout of the route, that is, the user traffic first goes to the provincial PGW, and returns.
  • the local server to the local city which causes the packet transmission delay to become longer, affects the user experience, and wastes the transmission bandwidth between the provincial capital and the local city.
  • 3GPP defines the Selective Traffic Offload (SIPTO) function.
  • SGW Selective Traffic Offload
  • LPGW Local Packet Data Network Gateway
  • IPTO Selective Traffic Offload
  • the core idea is to deploy SGW and local data gateway (Local Packet Data Network Gateway) close to the user's network access location (such as the city). , LPGW).
  • LPGW Local Packet Data Network Gateway
  • the IP address is assigned by the LPGW, and the traffic only passes through the LPGW. This avoids the problems caused by routing bypasses. Since the location of the LPGW is low, when the user moves to the LPGW jurisdiction, the user IP address is generally released and the LPGW is reselected, so the IP assigned by the LPGW does not guarantee the continuity of the session.
  • the application on the user terminal should select different IPs to initiate the service according to its own needs.
  • the user terminal maintains a list of different access point names (APNs) of the operator and their corresponding attributes, so that the application on the user terminal can be connected according to the needs of the user.
  • the operator selects an IP address corresponding to a different APN to initiate a service.
  • the list of operators' APNs will be relatively large, resulting in, for example, occupying too much terminal memory to maintain the APN list.
  • the number of mobile operators will increase dynamically, and each additional operator needs to dynamically modify the APN list, which requires the terminal to frequently update the APN list, and the real-time performance of the APN list update cannot be It is guaranteed that if the mobile phone user selects a new carrier and the list is not updated, it is impossible to select a suitable IP address to initiate the service.
  • the present invention provides a method for allocating an IP address, which enables the terminal to select a suitable IP address to initiate a service, and avoids the problem that the terminal brought by the maintenance of the APN list needs to be adapted to different operators.
  • a method for IP address allocation comprising:
  • the IP address allocation device transmits an IP address and a mobility attribute of the IP address to the UE;
  • the UE selects an IP address corresponding to its mobility requirement to initiate a service.
  • the method before the IP address allocation device sends the IP address and the mobility attribute of the IP address to the UE, the method further includes:
  • the MME Determining, by the MME, the IP address mobility attribute of the UE based on the attach request message or the PDN connection establishment request message, selecting an IP address allocation device corresponding to the IP address mobility attribute, and transmitting the created to the IP address allocation device Session request message;
  • the IP address allocation device sends the IP address to the UE and the mobility attribute of the IP address includes:
  • the IP address distribution apparatus After receiving the create session request message from the MME, the IP address distribution apparatus sends a create session response message to the MME, where the create session response message carries the IP address and the mobility of the IP address. Attributes;
  • the MME returns an attach accept message or a PDN connection setup request message to the UE by using the base station, and the attach accept message or the PDN connection setup request carries the IP address and the mobility attribute of the IP address.
  • the attach request message carries the mobility preference information of the UE, and/or the PDN connection establishment request message And carrying the mobility preference information of the UE, where the MME determines the mobility attribute according to the mobility preference information.
  • the IP address allocation device is a PGW, and the corresponding IP address mobility attribute is to provide mobility, or the IP The address allocation device is an LPGW, and its corresponding IP address mobility attribute is not providing a shift.
  • the IP address allocation device is integrated in the convergence control function CCF.
  • the method further includes:
  • the CCF sends a forwarding rule to the selected forwarding device, so that the forwarding device processes the IP packet corresponding to the mobility attribute sent by the UE according to the forwarding rule;
  • the IP address allocation device sends the IP address to the UE and the mobility attribute of the IP address includes:
  • the CCF returns an IP address response message to the UE, and the IP address response message carries the IP address and a mobility attribute of the IP address.
  • the IP address request message is an attach request message or a PDN connection setup request message
  • the IP address response message is an attach response message. Or a PDN connection setup response message.
  • the IP address request message is a DHCP request message or a router request
  • the IP address response message is a DHCP response message or a router advertisement. Message.
  • the method further includes:
  • the CCF sends a bearer setup request message to the base station, and sends a session management request message to the UE by using the base station, where the session management request message carries the service flow template TFT information.
  • the UE transmits an IP packet matching the TFT information to the forwarding device.
  • the IP address request request message carries the mobility preference information of the UE, where the CCF is based on a mobility preference of the UE.
  • the information determines the IP address mobility attribute of the UE.
  • the IP address mobility attribute includes providing mobility and not providing mobility
  • the forwarding device The device includes a first forwarding device corresponding to providing mobility and a second forwarding device corresponding to not providing mobility.
  • a method for IP address allocation comprising:
  • the UE receives an IP address assigned by the IP address allocation device and a mobility attribute of the IP address;
  • the UE selects an IP address corresponding to its mobility requirement to initiate a service.
  • the method before the UE receives the IP address allocated by the IP address allocation device and the mobility attribute of the IP address, the method further includes:
  • the UE receives an attach accept message or a PDN connection setup request message returned by the MME by the base station, and the attach accept message or the PDN connection setup request message carries the IP address and the mobility attribute of the IP address.
  • the attach request message carries the mobility preference information of the UE, and/or the PDN connection setup request message And carrying the mobility preference information of the UE, so that the MME determines the mobility attribute according to the mobility preference information.
  • the IP address allocation apparatus includes a first IP address allocation device and a second IP address allocation device,
  • the UE receiving the IP address assigned by the IP address allocating device and the mobility attribute of the IP address include:
  • the mobility attribute of the IP address includes providing mobility and not providing mobility, providing mobility corresponding to the first IP address allocation device, and providing no mobility corresponding to the second IP address allocation device.
  • the IP address allocation device is integrated in the convergence control function CCF.
  • the method further includes:
  • the UE receives an IP address response message returned by the CCF, where the IP address response message carries the IP address and a mobility attribute of the IP address.
  • the IP address request message is an attach request message or a PDN connection setup request message
  • the IP address response message is an attach response message or a PDN. Connection establishment response message.
  • the IP address request message is a DHCP request message or a router request
  • the IP address response message is a DHCP response message or a router advertisement message.
  • the method further includes:
  • the UE transmits an IP packet that matches the TFT information.
  • the IP address request request message carries the mobility preference information of the UE, so that the CCF according to the mobility preference of the UE The information determines the IP address mobility attribute of the UE.
  • a network system for IP address allocation including an IP address allocation device and a UE, wherein:
  • the IP address allocation device is configured to send an IP address to the UE and a mobility attribute of the IP address;
  • the UE is configured to select an IP address corresponding to its mobility requirement to initiate a service.
  • the network system further includes an MME
  • the UE Before the IP address allocation device sends the IP address and the mobility attribute of the IP address to the UE, the UE is further configured to send an attach request message or a PDN connection setup request message to the MME;
  • the MME is configured to determine an IP address mobility attribute of the UE based on the attach request message or a PDN connection establishment request message, and select an IP address allocation device corresponding to the IP address mobility attribute, and allocate the IP address to the IP address.
  • the device sends a create session request message;
  • the IP address allocation device is specifically configured to:
  • the IP address distribution apparatus After receiving the create session request message from the MME, the IP address distribution apparatus sends a create session response message to the MME, where the create session response message carries the IP address and the mobility of the IP address. Attributes;
  • the MME is further configured to: return, by the base station, an attach accept message or a PDN connection setup request message to the UE, where the attach accept message or the PDN connection setup request carries the IP address and the mobility attribute of the IP address .
  • the attach request message carries the mobility preference information of the UE, and/or the PDN connection establishment request message is Carrying mobility preference information of the UE,
  • the MME is further configured to: determine a mobility attribute according to the mobility preference information.
  • the IP address allocation device is a PGW, and the corresponding IP address mobility attribute is to provide mobility, or the IP address allocation.
  • the device is an LPGW, and the corresponding IP address mobility attribute is that no mobility is provided;
  • the IP address allocation device is integrated in the convergence control function CCF.
  • the UE Before the IP address allocation device sends the IP address and the mobility attribute of the IP address to the UE, the UE is further configured to: send an IP address request message to the CCF; the CCF is used to: determine Determining an IP address mobility attribute of the UE, and selecting a corresponding forwarding device according to the IP address mobility attribute of the UE;
  • the CCF is further configured to: send a forwarding rule to the selected forwarding device, so that the forwarding device processes the IP packet corresponding to the mobility attribute sent by the UE according to the forwarding rule;
  • the IP address allocation device is specifically configured to:
  • the CCF returns an IP address response message to the UE, and the IP address response message carries the IP address and a mobility attribute of the IP address.
  • the IP address request message is an attach request message or a PDN connection setup request message, where the IP address response message is an attach response message or The PDN connection establishes a response message.
  • the IP address request message is a DHCP request message or a router request
  • the IP address response message is a DHCP response message or a router advertisement message.
  • the base station is further included
  • the CCF After the CCF returns a DHCP response message or a router advertisement message to the UE, the CCF is further configured to: send a bearer setup request message to the base station, and send the UE to the UE by using the base station. Sending a session management request message, where the session management request message carries the service flow template TFT information,
  • the UE transmits an IP packet matching the TFT information to the forwarding device.
  • the IP address request request message carries the mobility preference information of the UE
  • the CCF is further configured to: determine an IP address mobility attribute of the UE according to the mobility preference information of the UE.
  • the IP address mobility attribute includes providing mobility and not providing mobility
  • the forwarding device includes The first corresponding forwarding device and the second forwarding device corresponding to not providing mobility.
  • a fourth aspect provides a user equipment UE, where the UE includes a receiving module and a processing module, where:
  • the receiving module is configured to receive an IP address allocated by the IP address allocation device and a mobility attribute of the IP address;
  • the processing module is configured to select an IP address corresponding to its mobility requirement to initiate a service.
  • the UE further includes a sending module
  • the sending module is configured to send an attach request message or a PDN connection setup request message to the MME;
  • the receiving module is further configured to: receive an attach accept message or a PDN connection setup request message returned by the MME by the base station, where the attach accept message or the PDN connection setup request message carries the IP address and the IP address Mobility properties.
  • the attach request message carries the mobility preference information of the UE, and/or the PDN connection setup request message is carried in the The mobility preference information of the UE, so that the MME determines the mobility attribute according to the mobility preference information.
  • the IP address allocation apparatus includes a first IP address allocation device and a second IP address allocation device,
  • the receiving module is specifically configured to:
  • the mobility attribute of the IP address includes providing mobility and not providing mobility, wherein providing mobility corresponds to the first IP address allocation device, and providing no mobility corresponding to the second IP address allocation device .
  • the IP address allocation device is integrated in the convergence control function CCF.
  • the sending module is further configured to: send an IP address request message to the CCF;
  • the receiving module is configured to receive an IP address response message returned by the CCF, where the IP address response message carries the IP address and a mobility attribute of the P address.
  • the IP address request message is an attach request message or a PDN connection setup request message
  • the IP address response message is an attach response message or a PDN. Connection establishment response message.
  • the IP address request message is a DHCP request message or a router request
  • the IP address response message is a DHCP response message or a router advertisement message.
  • the receiving module after the receiving module receives the DHCP response message or the router advertisement message returned by the CCF, the receiving module is further configured to: receive a session management request message, where the session management request message carries service flow template TFT information,
  • the sending module is further configured to: transmit an IP packet that matches the TFT information.
  • the IP address request request message carries the mobility preference information of the UE, so that the CCF according to the mobility preference of the UE The information determines the IP address mobility attribute of the UE.
  • the IP address allocation method, the network system, and the UE provided by the embodiment of the present invention can make the terminal select a suitable IP address according to its mobility requirement more easily and conveniently by specifying its corresponding mobility attribute when assigning an IP address.
  • the service that avoids maintaining the APN list needs to adapt to different operators.
  • FIG. 1 is a flowchart of a method for IP address allocation according to an embodiment of the present invention
  • FIG. 2 is a flowchart of a method for IP address allocation according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of a method for allocating an IP address according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of a method for allocating an IP address according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a method for allocating an IP address according to an embodiment of the present invention.
  • 6A is a structural block diagram of a network system according to an embodiment of the present invention.
  • 6B is a structural block diagram of another network system according to an embodiment of the present invention.
  • FIG. 7A is a structural block diagram of a user equipment (UE) according to an embodiment of the present invention.
  • FIG. 7B is a structural block diagram of another UE according to an embodiment of the present invention.
  • Base station In this paper, it may be an evolved Node B (eNB) for implementing wireless related functions.
  • eNB evolved Node B
  • Mobility Management Entity responsible for user mobility management, including user context and mobility state management, assigning user temporary identity, authenticating and authorizing users;
  • S-GW Serving Gateway
  • PGW Packet Data Network Gateway
  • Packet Data Network Gateway is a forwarding plane anchor between a 3GPP access network and a non-3GPP access network, and an interface of an external packet data network (PDN: Packet Data Network); has an IP address Allocation function, with bearer management function, can establish multiple transmission tunnels (via SGW) with the base station;
  • Gateway user plane has user packet forwarding, encapsulation, statistics and other functions;
  • Converged control function integrates functions such as MME and gateway control plane. In addition to responsible for user mobility management, it also has IP address allocation, selects gateway user plane equipment, bearer management, and generates gateway user plane forwarding rules. And other functions.
  • FIG. 1 is a flowchart of a method for IP address allocation according to an embodiment of the present invention.
  • a method for IP address allocation according to an embodiment of the present invention includes:
  • the IP address allocation device transmits an IP address and a mobility attribute of the IP address to the UE;
  • the UE selects an IP address corresponding to its mobility requirement to initiate a service.
  • the mobility attribute in this document refers to whether the network maintains the IP address unchanged after the user moves, that is, session continuity.
  • the mobility attributes in this application may include the following two types: providing mobility and not providing mobility. Of course, there may be other ways of dividing, for example, high (ie, corresponding to providing mobility) and low (ie, corresponding to not providing mobility) partitioning of mobility attributes.
  • high ie, corresponding to providing mobility
  • low ie, corresponding to not providing mobility
  • the IP address allocation method provided by the embodiment of the present invention since the mobility attribute of the IP is universal and cross-operator, the UE does not need to separately maintain its APN meaning list for each operator, but only needs to record the assigned
  • the IP address and its corresponding attributes can simplify the implementation of the mobile phone.
  • the mobile phone When the mobile phone is connected to the new carrier, it can be updated and recorded only by performing the IP address allocation process again. No additional APN is needed to provide the service list update. The problem that the related technology update does not cause IP to be selected in time.
  • the method before the IP address allocating device sends the IP address and the mobility attribute of the IP address to the UE, the method further includes:
  • the MME Determining, by the MME, the IP address mobility attribute of the UE based on the attach request message or the PDN connection establishment request message, selecting an IP address allocation device corresponding to the IP address mobility attribute, and transmitting the created to the IP address allocation device Session request message.
  • the sending, by the IP address allocation device, the IP address and the mobility attribute of the IP address to the UE in the step 12 may include:
  • the IP address distribution apparatus After receiving the create session request message from the MME, the IP address distribution apparatus sends a create session response message to the MME, where the create session response message carries the IP address and the mobility of the IP address. Attributes;
  • the MME returns an attach accept message or a PDN connection setup request message to the UE by using the base station, and the attach accept message or the PDN connection setup request carries the IP address and the mobility attribute of the IP address.
  • the mobility request information of the UE may be carried in the attach request message, and/or the mobility preference information of the UE may be carried in the PDN connection setup request message. In this way, the MME can determine the mobility attribute based on the mobility preference information.
  • the method for IP address allocation provided by the embodiment of the present invention can be applied to an EPS network.
  • the IP address allocating means may be a PGW or an LPGW.
  • the IP address allocation device is a PGW, its corresponding IP address mobility attribute is to provide mobility; when the IP address allocation device is an LPGW, its corresponding IP address mobility attribute is not providing mobility.
  • the IP address allocating means may comprise a plurality of IP address allocating means.
  • the IP address allocating means may include a first IP address allocating means and a second IP address allocating means.
  • the first IP address assigning means and the second IP address assigning means respectively assign the first IP address and its corresponding mobility attribute, and the second IP address and their corresponding mobility attributes to the UE.
  • the mobility attribute assigned by the first IP address allocation device may be different from the mobility attribute assigned by the second IP address.
  • the first IP address allocating device may be a PGW (providing mobility), and the second IP address allocating device may be an LPGW (not providing mobility); or, the The first IP address allocating means may be an LPGW (no mobility provided) and the second IP address allocating means may be a PGW (providing mobility).
  • the attach request message may carry the mobility preference information of the UE and send the information to the MME.
  • the mobility preference information of the UE may also be carried in the PDN connection setup request message and sent to the MME. In this way, the MME can more conveniently select the corresponding gateway according to the received mobility preference information of the UE.
  • the method for IP address allocation provided by the embodiment of the present invention is applicable to a network architecture after the control plane and the user plane are separated.
  • the IP address allocation device is integrated in a Convergence Control Function (CCF).
  • CCF Convergence Control Function
  • Method for assigning IP address provided by embodiment of the present invention
  • the IP address allocation device may further include:
  • the CCF sends a forwarding rule to the selected forwarding device, so that the forwarding device processes the IP packet corresponding to the mobility attribute sent by the UE according to the forwarding rule.
  • the IP address allocation device sends the IP address to the UE and the mobility attribute of the IP address in the step 11 may include:
  • the CCF returns an IP address response message to the UE, and the IP address response message carries the IP address and a mobility attribute of the IP address.
  • the IP address request message may be an attach request message or a PDN connection setup request message
  • the IP address response message may be an attach response message or a PDN connection setup response message
  • the IP address request message may be a DHCP request message or a router request
  • the IP address response message may be a DHCP response message or a router advertisement message
  • the method may further include:
  • the CCF sends a bearer setup request message to the base station, and sends a session management request message to the UE by using the base station, where the session management request message carries the service flow template TFT information.
  • the UE transmits an IP packet matching the TFT information to the forwarding device.
  • the IP address request request message may carry the mobility preference information of the UE, where the CCF is The IP address mobility attribute of the UE may be determined according to the mobility preference information of the UE.
  • the forwarding device may include a first forwarding device corresponding to providing mobility and a second forwarding device corresponding to not providing mobility .
  • the IP address allocation protocol message of the user plane is forwarded to the CCF (control plane) and the CCF (control plane) is triggered to select a new forwarding device (gateway to switch)
  • the IP address is assigned, so that the UE can simultaneously allocate two IP addresses with different mobility attributes by using one PDN connection, which avoids forcing the UE to support multiple PDN connections, and is compatible with only supporting single PDN connections through user plane IP address allocation.
  • the protocol assigns terminals with multiple IP addresses.
  • FIG. 2 is a flowchart of another method for IP address allocation according to an embodiment of the present invention.
  • a method for IP address allocation provided by an embodiment of the present invention may include:
  • the UE receives an IP address assigned by the IP address allocation device and a mobility attribute of the IP address.
  • the UE selects an IP address corresponding to its mobility requirement to initiate a service.
  • the mobility attribute in this document refers to whether the network maintains the IP address unchanged after the user moves, that is, session continuity.
  • the mobility attributes in this application may include the following two types: providing mobility and not providing mobility. Of course, there may be other ways of dividing, for example, high (ie, corresponding to providing mobility) and low (ie, corresponding to not providing mobility) partitioning of mobility attributes.
  • high ie, corresponding to providing mobility
  • low ie, corresponding to not providing mobility
  • the IP address allocation method provided by the embodiment of the present invention since the mobility attribute of the IP is universal and cross-operator, the UE does not need to separately maintain its APN meaning list for each operator, but only needs to record the assigned
  • the IP address and its corresponding attributes can simplify the implementation of the mobile phone.
  • the mobile phone When the mobile phone is connected to the new carrier, it can be updated and recorded only by performing the IP address allocation process again. No additional APN is needed to provide the service list update. The problem that the related technology update does not cause IP to be selected in time.
  • the method for IP address allocation provided by the embodiment of the present invention is applicable to an evolved packet system (EPS) network.
  • EPS evolved packet system
  • the method for allocating the IP address provided by the embodiment of the present invention includes the foregoing steps 21 and 22, before the UE receives the IP address assigned by the IP address allocation device and the mobility attribute of the IP address.
  • it can also include:
  • the UE receives an attach accept message or a PDN connection setup request message returned by the MME by the base station, and the attach accept message or the PDN connection setup request message carries the IP address and the mobility attribute of the IP address.
  • the attach request message carries the mobility of the UE.
  • the preference information, and/or the mobility preference information of the UE is carried in the PDN connection setup request message, so that the MME determines the mobility attribute according to the mobility preference information.
  • the IP address allocating device may include a first IP address allocating device and a second IP address allocating device.
  • the UE receiving the IP address allocated by the IP address allocating device and the mobility attribute of the IP address in the step 22 include:
  • the mobility attribute of the IP address includes providing mobility and not providing mobility, providing mobility corresponding to the first IP address allocation device, and providing no mobility corresponding to the second IP address allocation device.
  • the method for IP address allocation provided by the embodiment of the present invention is applicable to a network architecture after the control plane and the user plane are separated.
  • the IP address allocation device is integrated in a Convergence Control Function (CCF).
  • CCF Convergence Control Function
  • the method for IP address allocation provided by the embodiment of the present invention may further include:
  • the UE receives an IP address response message returned by the CCF, where the IP address response message carries the IP address and a mobility attribute of the IP address.
  • the IP address request request message may carry the mobility preference information of the UE, so that the CCF determines the IP address mobility attribute of the UE according to the mobility preference information of the UE.
  • the IP address request message may be an attach request message or a PDN connection setup request message
  • the IP address response message may be an attach response message or a PDN connection setup response message
  • the IP address request message may be a DHCP request message or a router request
  • the IP address response message may be a DHCP response message or a router advertisement message.
  • the UE receives the DHCP response message returned by the CCF.
  • the method may further include:
  • the UE transmits an IP packet that matches the TFT information.
  • the IP address allocation method forwards the IP address allocation protocol message of the user plane to the CCF (control plane) and triggers the CCF (control plane) to select a new forwarding device (gateway forwarding plane) and allocates the IP address.
  • the address is such that the UE can simultaneously allocate two IP addresses with different mobility attributes by using one PDN connection, which avoids forcing the UE to support multiple PDN connections, and is compatible with supporting only a single PDN connection to allocate multiple IP addresses through the user plane IP address allocation protocol. Terminal.
  • FIG. 3 is a schematic diagram of a method for IP address allocation according to an embodiment of the present invention. Referring to FIG. 3, the method can be applied to a conventional EPS network, including:
  • the UE sends an attach request message to the MME by using the eNB, where the mobility request attribute of the preferred IP address of the UE is optionally included in the attach request message, which may be carried by the extended PDN type parameter.
  • Provide mobility
  • the MME authenticates the UE. If the UE passes the authentication, the security context is established with the UE. Since the encryption option transmission flag is not carried, the MME selects the default APN in the user subscription and the preferred IP address mobility attribute selection gateway of the UE, if the UE If the IP address mobility attribute is not carried, the MME may select a gateway according to the default preferred IP address mobility attribute in the subscription. If the preferred IP address mobility attribute is high mobility and the subscription is allowed, the centrally deployed gateway is selected to allocate the user. IP address, otherwise the gateway selected for distributed deployment assigns an IP address to the user, and the MME selects the SGW according to the selected packet gateway and the user location. Note that if the UE prefers high mobility, but the subscriber subscription only allows for low mobility, the MME selects the master with a subscription, ie, with low mobility.
  • the MME sends a create session request message to the selected SGW, and carries information such as a PDN type, an APN, an international mobile subscriber identity (IMSI), a PGW address, and the like, and optionally carries a mobility attribute of the IP address.
  • a create session request message to the selected SGW, and carries information such as a PDN type, an APN, an international mobile subscriber identity (IMSI), a PGW address, and the like, and optionally carries a mobility attribute of the IP address.
  • IMSI international mobile subscriber identity
  • the SGW sends a Create Session Request message to the PGW according to the PGW address in the step 332, and carries the information such as the PDN type, the APN, the IMSI, and the Tunnel Endpoint Identifier (TEID), and optionally the mobility attribute carrying the IP address. ;
  • the PGW allocates an IP address in the corresponding network according to the PDN type, and returns a create session response message to the SGW, and carries the TEID (tunnel identification) information and the allocated information of the PGW.
  • the IP address and the mobility attribute of the assigned IP address (this attribute can be carried by the extended PCO parameter). Since the gateway is deployed in a higher position, the mobility attribute of the assigned IP address is high;
  • the SGW returns a create session response message to the MME.
  • the MME sends an initial context setup request message to the eNB, and the base station returns an attach accept message to the UE, including the APN information, the IP address information, and the mobility attribute of the IP address. At this time, the UE records the IP and its corresponding mobility attribute.
  • the eNB returns an initial context setup response message to the MME, where the eNB allocates a TEID, where the TEID is used to create a downlink forwarding tunnel between the SGW and the eNB.
  • the MME sends a modify bearer request message to the SGW, where the TEID allocated by the eNB is included;
  • the SGW returns a modify bearer response message.
  • the UE can send and receive an IP packet, if the application on the UE needs mobility support, that is, the mobile location IP address remains unchanged, the UE does not initiate a subsequent process. If some applications on the UE require mobility support, and some do not require mobility support and only access local services, a subsequent process is initiated;
  • the UE sends a PDN connection setup request message to the MME via the eNB, and may directly carry the APN information (same as the APN information returned to the UE in step 3366), and the preferred IP address mobility attribute (which may be carried by the extended PDN type parameter). ), for the embodiment, the mobility attribute is low, and it is not necessary to keep the IP unchanged at all times;
  • the MME selects a gateway according to the APN of the message and the preferred IP address mobility attribute of the UE, and still needs the subscription check, and selects the corresponding local gateway for the example.
  • the MME sends a create session request message to the SGW selected in step 332. Carry information such as PDN type, APN, IMSI, local gateway address, etc.
  • the SGW sends a create session request message to the local gateway according to the PGW address in step 334, and carries information such as a PDN type, an APN, an IMSI, and a TEID (tunnel identifier), and optionally carries a preferred IP address mobility attribute.
  • the local gateway allocates an IP address in the corresponding network according to the PDN type, and the APN returns a create session response message to the SGW, and carries the TEID (tunnel identification) information and the assigned IP address allocated by the local gateway, and the movement of the allocated IP address.
  • Sex attribute because it is a local gateway, the mobility attribute of its assigned IP address is low;
  • the SGW returns a create session response message to the MME.
  • the MME sends a bearer setup request message to the eNB, and returns a PDN connection to the UE by using the base station. And establishing a response message, where the PDN connection setup response message includes APN information, IP address information, and mobility attribute of the IP address; at this time, the UE records the IP and its corresponding mobility attribute;
  • the eNB returns a bearer setup response message to the MME.
  • the MME sends a modify bearer request message to the SGW.
  • the SGW returns a modify bearer response message.
  • the UE has two IP addresses, and the application on the UE selects a different IP address to initiate a service according to its own needs.
  • the mobile operating system saves the currently connected APN and the corresponding IP address, because different operators have different APN namings, such as China Mobile.
  • the APN that is served locally may be named A
  • the APN that is anchored unchanged is named B
  • China Unicom names the local service APN as X
  • the anchored APN is named Y
  • the phone may be connected.
  • Different operators so the mobile operating system maintains a list of all operators' APNs and their corresponding attributes.
  • the API provided by the operating system is called to request the IP of the specific attribute.
  • the APP1 may need to have the IP unchanged, and the mobile operating system returns the corresponding according to the currently connected PLMN and the APN list corresponding to the PLMN.
  • the IP address of the attribute After the APP obtains the specific attribute IP, it calls the API provided by the socket (socekt) to initiate the IP service.
  • the API can specify the source address required for the IP service.
  • Other possible implementations include the application maintaining a list of all operators' APNs and their corresponding attributes.
  • the mobile operating system or the application does not need to separately maintain the APN meaning list for each operator, but only needs to record the allocated
  • the IP address and its corresponding attributes can simplify the implementation of the terminal (such as mobile phone).
  • the terminal When the terminal connects to the new carrier, it only needs to perform the IP address allocation process again to update and record. No additional APN is required.
  • the service list update solves the problem that the prior art update does not cause IP to be selected in time.
  • the socket programming interface to provide mobility attributes, the implementation of the mobile application can be simplified, and the additional processing brought by the source IP of the mobile application can be avoided, which simplifies the implementation of the application.
  • FIG. 4 is a schematic diagram of a method for IP address allocation according to an embodiment of the present invention.
  • the method can be applied to a network architecture in which a control plane and a user name are separated, including:
  • the UE sends an attach request message to the CCF by using the eNB, and optionally carries the mobility preference information of the UE (can be carried by extending the PCO parameter);
  • the CCF authenticates the UE, and if the UE passes the authentication, the security context is established with the UE. Because the encryption option is not carried, the CCF selects the default APN in the user subscription and the preferred mobility attribute carried by the UE, and selects the corresponding forwarding device. (Gateway forwarding plane), if the preferred IP address mobility attribute is high, select the centrally deployed forwarding device (gateway forwarding plane), otherwise select the distributed deployment forwarding device (gateway forwarding plane).
  • the CCF allocates the IP address of the user and sends an uplink forwarding rule to the forwarding device (the gateway forwarding plane) to instruct the forwarding device (the gateway forwarding plane) how to process the IP packet sent by the UE.
  • the CCF sends an initial context setup request message to the eNB, where the allocated TEID is included, and the base station returns an attach accept message to the UE, including the APN, the allocated IP address, and the mobility attribute corresponding to the address.
  • the eNB returns an initial context setup response message to the CCF, where the TEID allocated by the eNB is included.
  • the CCF sends a downlink forwarding rule to the forwarding device (the gateway forwarding plane), instructing the forwarding device (the gateway forwarding plane) to process the IP packet sent to the UE, and after receiving the IP packet sent to the UE, encapsulating the eNB allocation
  • the TEID is sent to the base station; if the application on the UE needs mobility support, that is, the mobile location IP address remains unchanged, the UE does not initiate the subsequent process. If some applications on the UE require mobility support, and some do not require mobility support and only access local services, a subsequent process is initiated;
  • the UE sends a PDN connection setup request message to the CCF by using the eNB, and may directly carry the APN information (same as the APN information returned to the UE in the foregoing step 443), and the mobility attribute of the optional IP address.
  • the CCF selects a corresponding forwarding device (gateway forwarding plane) according to an optional IP address mobility attribute of the PDN connection message, and user subscription information (whether or not the type of address is allowed to be allocated), and allocates the user's IP address 2 to For example, a forwarding device (gateway forwarding plane) with a lower (local) location is selected; the CCF (Gateway Control Plane) sends an uplink forwarding rule to the forwarding device (the gateway forwarding plane), indicating how the forwarding device (gateway forwarding plane) processes the UE.
  • IP packet the source address is IP address 2
  • IP address 2 IP address 2
  • the CCF sends a bearer setup request message to the eNB, where the control plane allocates the TEID, and the base station returns a PDN connection setup response message to the UE, including the APN information, the IP address information, and the mobility attribute of the IP address.
  • the eNB returns a bearer setup response message to the CCF, where the TEID allocated by the eNB is included.
  • the CCF sends a downlink forwarding rule to the forwarding device (the gateway forwarding plane), and instructs the forwarding device (the gateway forwarding plane) how to process the IP packet sent to the UE (the destination address is the IP address 2), and sends the packet to the UE.
  • the TEID of the eNB is encapsulated and sent to the base station.
  • the UE has two IP addresses. The application on the UE selects different IP addresses to initiate services according to its own requirements.
  • the mobile operating system or the application since the mobility attribute of the IP is universal and cross-operator, the mobile operating system or the application does not need to separately maintain the APN meaning list for each operator, but only needs to record the allocated
  • the IP address and its corresponding attributes can simplify the implementation of the mobile phone.
  • the mobile phone When the mobile phone is connected to the new carrier, it can be updated and recorded only by performing the IP address allocation process again. No additional APN is needed to provide the service list update.
  • the problem that the prior art update does not cause IP to be selected in time.
  • the implementation of the mobile application can be simplified, and the additional processing brought by the source IP of the mobile application can be avoided, which simplifies the implementation of the application.
  • FIG. 5 is a schematic diagram of a method for IP address allocation according to an embodiment of the present invention.
  • the method can be applied to a network architecture in which a control plane and a user name are separated, including:
  • the UE sends an attach request message to the CCF by using the eNB, and optionally carries the mobility preference information of the UE.
  • the CCF authenticates the UE. If the UE passes the authentication, the security context is established with the UE. Since the encryption option is not carried and the preferred IP address mobility attribute is not carried, the CCF selects the default APN and the default IP in the user subscription. The address mobility attribute selects the corresponding forwarding device (gateway forwarding plane). After selecting the forwarding device (gateway forwarding plane), the CCF allocates the user's IP address 1 and sends an uplink forwarding rule to the forwarding device (gateway forwarding plane).
  • the CCF sends an initial context setup request message to the eNB, where the control plane allocates the TEID, and the base station returns an attach accept message to the UE, including the APN, the allocated IP address, and the mobility attribute corresponding to the address.
  • the eNB returns an initial context setup response message to the CCF, where the TEID allocated by the eNB is included.
  • the CCF sends a downlink forwarding rule to the gateway forwarding plane, instructing the gateway forwarding plane to process the IP packet sent to the UE, and after receiving the IP packet sent to the UE, encapsulating the TEID allocated by the eNB and sending the TEID to the base station;
  • the application on the UE needs mobility support, that is, the mobile location IP address remains unchanged, and the UE does not initiate the subsequent process. If some applications on the UE require mobility support, and some do not require mobility support and only access local services, a subsequent process is initiated;
  • the UE initiates an additional address allocation process (DHCP or IPV6 stateless address autoconfiguration protocol) on the user plane, and carries the UE preferred IP address attribute, for example, low mobility for this example;
  • DHCP IPV6 stateless address autoconfiguration protocol
  • the forwarding device After receiving the DHCP or IPV6 stateless address autoconfiguration protocol packet, the forwarding device (the gateway forwarding plane) sends the packet to the CCF according to the uplink forwarding rule in step 542.
  • the CCF selects a corresponding forwarding device (gateway forwarding plane) according to the preferred IP address attribute in the report message and the user subscription information (whether or not the type of address is allowed to be assigned), and allocates the user's IP address 2, and selects the case for this example.
  • the CCF encapsulates the DHCP response or the stateless address autoconfiguration protocol response message of the IPV6 is sent to the forwarding device (the gateway forwarding plane);
  • the forwarding device (the gateway forwarding plane) sends a DHCP response or a stateless address autoconfiguration protocol response packet of the IPV6 to the UE, including the allocated IP address and the mobility attribute corresponding to the address.
  • the CCF sends a bearer setup request message to the eNB, including the allocated TEID, and the base station sends a session management request message to the UE, where the UE includes the TFT information, and indicates that the UE sends the packet whose source address is the IP address 2 in the bearer.
  • the eNB returns a bearer setup response message to the CCF, where the TEID allocated by the eNB is included.
  • the CCF sends a downlink forwarding rule to the forwarding device (the gateway forwarding plane), and instructs the forwarding device (the gateway forwarding plane) how to process the IP packet sent to the UE (the destination address is the IP address 2), and sends the packet to the UE.
  • the TEID of the eNB is encapsulated and sent to the base station.
  • the UE has two IP addresses. The application on the UE selects different IP addresses to initiate services according to its own requirements.
  • the embodiment also uses the programmability of the forwarding device (gateway forwarding plane) to forward the IP address allocation protocol packet of the user plane to the CCF (control plane) and trigger
  • the CCF selects a new forwarding device (gateway forwarding plane) and assigns an IP address, so that the UE can simultaneously allocate two IP addresses with different mobility attributes by using one PDN connection, thereby avoiding forcing the UE to support multiple PDN connections, and is compatible with the support list only.
  • the PDN connection is a terminal that allocates multiple IP addresses through a user plane IP address allocation protocol.
  • FIG. 6A is a network system for IP address allocation according to an embodiment of the present invention.
  • the network system 600 provided by the embodiment of the present invention may include an IP address allocation device 601 and a UE 602. among them:
  • the IP address allocation device 601 is configured to send an IP address and a mobility attribute of the IP address to the UE;
  • the UE 602 is configured to select an IP address corresponding to the mobility requirement of the IP address allocation device to initiate a service.
  • the IP address allocation method provided by the embodiment of the present invention since the mobility attribute of the IP is universal and cross-operator, the UE does not need to separately maintain its APN meaning list for each operator, but only needs to record the assigned
  • the IP address and its corresponding attributes can simplify the implementation of the mobile phone.
  • the mobile phone When the mobile phone is connected to the new carrier, it can be updated and recorded only by performing the IP address allocation process again. No additional APN is needed to provide the service list update. The problem that the related technology update does not cause IP to be selected in time.
  • the network system 600 further includes an MME 603 and a base station 604.
  • the UE 602 is further configured to: send an attach request message or a PDN connection setup request message to the MME 603;
  • the MME 603 is configured to determine an IP address mobility attribute of the UE 602 based on the attach request message or a PDN connection setup request message, and select an IP address allocation device corresponding to the IP address mobility attribute to the IP
  • the address allocation device sends a create session request message
  • the IP address allocation device 601 is specifically configured to:
  • the IP address allocating device 601 After receiving the create session request message from the MME, the IP address allocating device 601 sends a create session response message to the MME, where the create session response message carries the An IP address and a mobility attribute of the IP address;
  • the MME 603 is further configured to: return, by the base station, an attach accept message or a PDN connection setup request message to the UE, where the attach accept message or the PDN connection setup request carries the IP address and the mobility of the IP address. Attributes.
  • the attach request message carries the mobility preference information of the UE, and/or the mobility preference information of the UE is carried in the PDN connection setup request message,
  • the MME is further configured to: determine a mobility attribute according to the mobility preference information.
  • the IP address allocation device is a PGW, and the corresponding IP address mobility attribute is to provide mobility, or the IP address allocation device is an LPGW, and the corresponding IP address mobility attribute is not providing mobility;
  • the IP address allocation device 601 is integrated in the convergence control function CCF.
  • the UE 602 is further configured to: send an IP address request message to the CCF; Determining an IP address mobility attribute of the UE, and selecting a corresponding forwarding device according to the IP address mobility attribute of the UE;
  • the CCF is further configured to: send a forwarding rule to the selected forwarding device, so that the forwarding device processes the IP packet corresponding to the mobility attribute sent by the UE according to the forwarding rule;
  • the IP address allocation device is specifically configured to:
  • the CCF returns an IP address response message to the UE, and the IP address response message carries the IP address and a mobility attribute of the IP address.
  • the IP address request message is an attach request message or a PDN connection setup request message
  • the IP address response message is an attach response message or a PDN connection setup response message.
  • the IP address request message is a DHCP request message or a router request
  • the IP address response message is a DHCP response message or a router advertisement message.
  • the CCF is further configured to: send a bearer setup request message to the base station 604, and pass the The base station 604 sends a session management request message to the UE 602, where the session management request message carries the service flow template TFT information.
  • the base station 604 sends a bearer setup response message to the CCF;
  • the UE 602 transmits an IP packet matching the TFT information to the forwarding device.
  • the IP address request request message carries the mobility preference information of the UE
  • the CCF is further configured to: determine an IP address mobility attribute of the UE according to the mobility preference information of the UE 602.
  • the IP address mobility attribute includes providing mobility and not providing mobility
  • the forwarding device includes a first forwarding device corresponding to providing mobility and a second forwarding device corresponding to not providing mobility .
  • the mobility attribute is specified, so that the terminal application can select different source IP transmission service packets according to the mobility requirement, and the terminal that needs to use multiple APNs needs to be adapted to different operators.
  • the problem simplifies the mechanism by which the terminal application selects the source address.
  • FIG. 7A is a structural block diagram of a user equipment UE according to an embodiment of the present invention.
  • a UE 700 according to an embodiment of the present invention includes a receiving module 701 and a processing module 702, where:
  • the receiving module 701 is configured to receive an IP address allocated by the IP address allocation device and a mobility attribute of the IP address;
  • the processing module 702 is configured to select an IP address to initiate a service corresponding to the mobility requirement of the mobile device.
  • the UE since the mobility attribute of the IP is universal and cross-operator, the UE does not need to separately maintain its APN meaning list for each operator, but only needs to record the assigned IP address and its The corresponding attribute can be simplified, and the implementation is simplified.
  • the UE connects to the new operator, it only needs to perform the IP address allocation process again to update and record. No additional APN is needed to provide the service list update, and the related technology update is not solved. The problem that IP can't be selected in time.
  • the UE 700 may further include a sending module 703.
  • the sending module 703 is configured to send an attach request message or a PDN connection setup request message to the MME;
  • the receiving module 701 is further configured to: receive an attach accept message or a PDN connection setup request message returned by the MME by the base station, where the attach accept message or the PDN connection setup request message carries the IP address and the IP The mobility attribute of the address.
  • the mobility request information of the UE may be carried in the attach request message, and/or the mobility preference information of the UE may be carried in the PDN connection setup request message, so that the MME is based on mobility.
  • the preference information determines the mobility attribute.
  • the IP address allocation device includes a first IP address
  • the address distribution device and the second IP address distribution device, the receiving module 701 is specifically configured to:
  • the mobility attribute of the IP address includes providing mobility and not providing mobility, wherein providing mobility corresponds to the first IP address allocation device, and providing no mobility corresponding to the second IP address allocation device .
  • the IP address allocation device is integrated in the convergence control function CCF.
  • the sending module 703 is further configured to: send an IP address request message to the CCF;
  • the receiving module 701 is configured to receive an IP address response message returned by the CCF, where the IP address response message carries the IP address and a mobility attribute of the P address.
  • the IP address request message is an attach request message or a PDN connection setup request message
  • the IP address response message is an attach response message or a PDN connection setup response message.
  • the IP address request message is a DHCP request message or a router request
  • the IP address response message is a DHCP response message or a router advertisement message.
  • the receiving module 701 is further configured to: receive a session management request message, where the session management request message carries the service flow template TFT information,
  • the sending module 703 is further configured to: transmit an IP packet that matches the TFT information.
  • the IP address request request message carries the mobility preference information of the UE, so that the CCF determines the IP address mobility attribute of the UE according to the mobility preference information of the UE.
  • the mobility attribute is specified, so that the terminal application can select different source IP transmission service packets according to the mobility requirement, and the terminal that needs to use multiple APNs needs to be adapted to different operators.
  • the problem simplifies the mechanism by which the terminal application selects the source address.
  • the embodiment of the present invention may further provide another UE, where the UE includes a processor and a receiver. among them:
  • the receiver is configured to receive an IP address allocated by an IP address allocation device and a mobility attribute of the IP address;
  • the processor is configured to select an IP address to initiate a service corresponding to the mobility requirement of the mobile device.
  • the UE further includes a transmitter, where the transmitter sends an attach request to the MME before the receiver receives the IP address allocated by the IP address allocation device and the mobility attribute of the IP address. a message or PDN connection setup request message;
  • the receiver is further configured to: receive an attach accept message or a PDN connection setup request message returned by the MME by the base station, where the attach accept message or the PDN connection setup request message carries the IP address and the IP address Mobility properties.
  • the attach request message carries the mobility preference information of the UE, and/or the PDN connection setup request message carries the mobility preference information of the UE, so that the MME is based on mobility.
  • the preference information determines the mobility attribute.
  • the IP address allocation device includes a first IP address allocation device and a second IP address allocation device,
  • the receiver is specifically configured to:
  • the mobility attribute of the IP address includes providing mobility and not providing mobility, wherein providing mobility corresponds to the first IP address allocation device, and providing no mobility corresponding to the second IP address allocation device .
  • the IP address allocation device is integrated in the convergence control function CCF, and the transmitter further uses the IP address allocated by the IP address allocation device and the mobility attribute of the IP address before the receiver receives the mobility attribute of the IP address distribution device. Sending an IP address request message to the CCF;
  • the receiver is configured to receive an IP address response message returned by the CCF, where the IP address response message carries the IP address and a mobility attribute of the P address.
  • the IP address request message is an attach request message or a PDN connection setup request message
  • the IP address response message is an attach response message or a PDN connection setup response message.
  • the IP address request message is a DHCP request message or a router request
  • the IP address response message is a DHCP response message or a router advertisement message.
  • the receiver is further configured to: receive a session management request message, where the session management request message carries the service flow template TFT information.
  • the transmitter is further configured to: transmit an IP packet that matches the TFT information.
  • the IP address request request message carries the mobility preference information of the UE, so that the CCF determines the IP address mobility attribute of the UE according to the mobility preference information of the UE.
  • the method for allocating an IP address provided by the embodiment of the present invention can make the terminal select a suitable IP address to initiate a service, and avoid the problem that the terminal brought by the maintenance of the APN list needs to be adapted to different operators.
  • the UE provided by the foregoing embodiment is only illustrated by the division of each functional module.
  • the function allocation may be completed by different functional modules according to requirements, that is, the internal structure of the device is divided into different Functional modules to perform all or part of the functions described above.
  • the apparatus for assigning an IP address provided by the foregoing embodiment is the same as the method embodiment of the IP address allocation. For the specific implementation process, refer to the method embodiment, and details are not described herein again.
  • a person skilled in the art may understand that all or part of the steps of implementing the above embodiments may be completed by hardware, or may be instructed by a program to execute related hardware, and the program may be stored in a computer readable storage medium.
  • the storage medium mentioned may be a read only memory, a magnetic disk or an optical disk or the like.

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Abstract

本发明实施例提供了一种IP地址分配的方法和装置，涉及领域通信领域，能够更简单方便地让终端选择合适的IP地址发起业务，避免维护APN列表带来的终端需要适配不同运营商的问题。所述IP地址分配的方法包括：IP地址分配装置向UE发送IP地址以及所述IP地址的移动性属性；所述UE选择与自身移动性需求对应的IP地址发起业务。本发明用于IP地址的分配。

Description

一种IP地址分配的方法和装置 技术领域
本发明涉及通信领域，特别涉及一种IP地址分配的方法和装置。
背景技术
在3GPP标准版本R8阶段发展出的演进分组系统架构中，分组数据网关(Packet Data Network Gateway，PGW)分配IP地址，为了保证用户IP地址的连续性，PGW部署位置较高，以中国为例一般部署于省会城市，这样当用户移动时，始终可以连接到PGW以保证用户分配IP不变。而在实际应用中，用户经常访问本地的业务服务器(以中国为例，这些服务器位于地市)，如果用户仍然连接PGW，则会出现路由的迂回，即用户流量先到省会的PGW，在返回到地市的本地服务器，这样导致了报文传输时延变长，影响用户体验，并且浪费了省会和地市之间的传输带宽。
为了解决这个问题，3GPP又定义了选择性流量旁路(Selected IP Traffic Offload，SIPTO)功能，其核心思想是在靠近用户入网位置(比如地市)部署SGW和本地数据网关(Local Packet Data Network Gateway，LPGW)。当用户访问本地服务器时，由LPGW分配IP地址，流量仅经过LPGW。这样就避免了路由迂回带来的各种问题。由于LPGW位置较低，当用户移动到LPGW管辖范围后，一般会释放用户IP地址，重新选择LPGW，所以LPGW分配的IP不保证其会话连续性。用户终端上的应用应根据自身需求来选择不同的IP来发起业务。
在选取IP地址的相关技术中，用户终端上会维护不同运营商接入点名称(Access Point Name，APN)列表以及其对应的属性，这样，用户终端上的应用就可以根据自身需求以及连接的运营商来选择不同APN对应的IP地址发起业务。
但是，由于全球移动运营商数量众多，运营商APN列表会比较庞大，导致例如占用过多的终端内存来维护APN列表。而且，由于虚拟运营商的兴起，移动运营商的数量会动态增加，而每增加一个运营商，就需要动态修改APN列表，这就要求终端频繁更新这个APN列表，而APN列表更新的实时性不能 得到保障，这就使得如果手机用户选择了新的运营商，而列表没有更新，就无法选择合适的IP地址发起业务。
发明内容
本发明提供一种IP地址分配的方法，能够更简单方便地让终端选择合适的IP地址发起业务，避免维护APN列表带来的终端需要适配不同运营商的问题。
第一方面，提供一种IP地址分配的方法，所述方法包括：
IP地址分配装置向UE发送IP地址以及所述IP地址的移动性属性；
所述UE选择与自身移动性需求对应的IP地址发起业务。
结合第一方面，在第一种可能的实现方式中，在所述IP地址分配装置向所述UE发送IP地址以及所述IP地址的移动性属性之前，所述方法还包括：
所述UE向MME发送附着请求消息或者PDN连接建立请求消息；
所述MME基于所述附着请求消息或者PDN连接建立请求消息，确定所述UE的IP地址移动性属性，选择与IP地址移动性属性相应的IP地址分配装置，向所述IP地址分配装置发送创建会话请求消息；
所述IP地址分配装置向所述UE发送IP地址以及所述IP地址的移动性属性包括：
所述IP地址分配装置在接收到来自所述MME的创建会话请求消息后，向所述MME发送创建会话应答消息，所述创建会话应答消息中携带所述IP地址以及所述IP地址的移动性属性；
所述MME通过基站向所述UE返回附着接受消息或者PDN连接建立请求消息，所述附着接受消息或者或者PDN连接建立请求中携带所述IP地址以及所述IP地址的移动性属性。
结合第一方面的第一种可能的实现方式，在第二种可能的实现方式中，所述附着请求消息中携带所述UE的移动性偏好信息，和/或，所述PDN连接建立请求消息中携带所述UE的移动性偏好信息，所述MME根据移动性偏好信息确定移动性属性。
结合第一方面的上述任一种可能的实现方式，在第三种可能的实现方式中，所述IP地址分配装置为PGW，其对应的IP地址移动性属性为提供移动性，或者所述IP地址分配装置为LPGW，其对应的IP地址移动性属性为不提供移 动性；
结合第一方面，在第四种可能的实现方式中，所述IP地址分配装置集成于融合控制功能CCF中，
所述IP地址分配装置向所述UE发送IP地址以及所述IP地址的移动性属性之前，所述方法还包括：
所述UE向所述CCF发送IP地址请求消息，所述CCF确定所述UE的IP地址移动性属性，根据所述UE的IP地址移动性属性，选择对应的转发装置；
所述CCF向选择的所述转发装置下发转发规则，以便所述转发装置根据所述转发规则处理所述UE发送的对应移动性属性的IP报文；
所述IP地址分配装置向所述UE发IP地址以及所述IP地址的移动性属性包括：
所述CCF向所述UE返回IP地址响应消息，所述IP地址响应消息携带所述IP地址以及所述IP地址的移动性属性。
结合第一方面的第四种可能的实现方式，在第五种可能的实现方式中，所述IP地址请求消息为附着请求消息或者PDN连接建立请求消息，所述IP地址响应消息为附着响应消息或者PDN连接建立响应消息。
结合第一方面的第四种可能的实现方式，在第六种可能的实现方式中，所述IP地址请求消息为DHCP请求消息或者路由器请求，所述IP地址响应消息为DHCP应答消息或路由器通告消息。
结合第一方面的第六种可能的实现方式，在第七种可能的实现方式中，在所述CCF向所述UE返回DHCP应答消息或者路由器通告消息之后，所述方法还包括：
所述CCF向基站发送承载建立请求消息，并通过所述基站向所述UE发送会话管理请求消息，所述会话管理请求消息携带业务流模板TFT信息，
所述基站向所述CCF发送承载建立应答消息；
所述UE向所述转发装置传输与所述TFT信息匹配的IP报文。
结合第一方面的第四种可能的实现方式，在第八种可能的实现方式中，所述IP地址请求请求消息中携带所述UE的移动性偏好信息，所述CCF根据UE的移动性偏好信息确定UE的IP地址移动性属性。
结合第一方面的第四种或第八种可能的实现方式，在第九种可能的实现方式中，所述IP地址移动性属性包括提供移动性和不提供移动性，所述转发装 置包括与提供移动性相对应的第一转发装置以及与不提供移动性相对应的第二转发装置。
第二方面，提供一种IP地址分配的方法，所述方法包括：
UE接收由IP地址分配装置分配的IP地址以及所述IP地址的移动性属性；
所述UE选择与自身移动性需求对应的IP地址发起业务。
结合第二方面，在第一种可能的实现方式中，在所述UE接收由IP地址分配装置分配的IP地址以及所述IP地址的移动性属性之前，所述方法还包括：
所述UE向MME发送附着请求消息或者PDN连接建立请求消息；
所述UE接收所述MME通过基站返回的附着接受消息或PDN连接建立请求消息，所述附着接受消息或所述PDN连接建立请求消息中携带所述IP地址以及所述IP地址的移动性属性。
结合第二方面的第一种可能的实现方式，在第二种可能的实现方式中，所述附着请求消息中携带所述UE的移动性偏好信息，和/或，所述PDN连接建立请求消息中携带所述UE的移动性偏好信息，以使所述MME根据移动性偏好信息确定移动性属性。
结合第二方面，在第三种可能的实现方式中，所述IP地址分配装置包括第一IP地址分配装置和第二IP地址分配装置，
所述UE接收由IP地址分配装置分配的IP地址以及所述IP地址的移动性属性包括：
所述UE接收由第一IP地址分配装置和/或第二IP地址分配装置分配的IP地址以及所述IP地址的移动性属性；
其中，所述IP地址的移动性属性包括提供移动性和不提供移动性，提供移动性与所述第一IP地址分配装置对应，不提供移动性与所述第二IP地址分配装置对应。
结合第二方面，在第四种可能的实现方式中，所述IP地址分配装置集成于融合控制功能CCF中，
在所述UE接收由IP地址分配装置分配的IP地址以及所述IP地址的移动性属性之前，所述方法还包括：
所述UE向所述CCF发送IP地址请求消息；
所述UE接收所述CCF返回的IP地址响应消息，所述IP地址响应消息中携带所述IP地址以及所述IP地址的移动性属性。
结合第二方面的第四种实现方式，在第五种可能的实现方式中，所述IP地址请求消息为附着请求消息或者PDN连接建立请求消息，所述IP地址响应消息为附着响应消息或者PDN连接建立响应消息。
结合第二方面的第四种实现方式，在第六种可能的实现方式中，所述IP地址请求消息为DHCP请求消息或者路由器请求，所述IP地址响应消息为DHCP应答消息或路由器通告消息。
结合第二方面的第六种实现方式，在第七种可能的实现方式中，在所述UE接收所述CCF返回的DHCP应答消息或者路由器通告消息之后，所述方法还包括：
所述UE接收会话管理请求消息，所述会话管理请求消息携带业务流模板TFT信息，
所述UE传输与所述TFT信息匹配的IP报文。
结合第二方面的第四种实现方式，在第八种可能的实现方式中，所述IP地址请求请求消息中携带所述UE的移动性偏好信息，以使所述CCF根据UE的移动性偏好信息确定UE的IP地址移动性属性。
第三方面，提供一种用于IP地址分配的网络系统，包括IP地址分配装置和UE，其中：
所述IP地址分配装置，用于向所述UE发送IP地址以及所述IP地址的移动性属性；
所述UE，用于选择与自身移动性需求对应的IP地址发起业务。
结合第三方面，在第一种可能的实现方式中，所述网络系统还包括MME，
在所述IP地址分配装置向所述UE发送IP地址以及所述IP地址的移动性属性之前，所述UE还用于，向MME发送附着请求消息或者PDN连接建立请求消息；
所述MME，用于基于所述附着请求消息或者PDN连接建立请求消息，确定所述UE的IP地址移动性属性，选择与IP地址移动性属性相应的IP地址分配装置，向所述IP地址分配装置发送创建会话请求消息；
所述IP地址分配装置具体用于：
所述IP地址分配装置在接收到来自所述MME的创建会话请求消息后，向所述MME发送创建会话应答消息，所述创建会话应答消息中携带所述IP地址以及所述IP地址的移动性属性；
所述MME还用于：通过基站向所述UE返回附着接受消息或者PDN连接建立请求消息，所述附着接受消息或者或者PDN连接建立请求中携带所述IP地址以及所述IP地址的移动性属性。
结合第三方面的第一种可能实现方式，在第二种可能的实现方式中，所述附着请求消息中携带所述UE的移动性偏好信息，和/或，所述PDN连接建立请求消息中携带所述UE的移动性偏好信息，
所述MME还用于：根据移动性偏好信息确定移动性属性。
结合第三方面的上述任一种实现方式，在第三种可能的实现方式中，所述IP地址分配装置为PGW，其对应的IP地址移动性属性为提供移动性，或者所述IP地址分配装置为LPGW，其对应的IP地址移动性属性为不提供移动性；
结合第三方面，在第四种可能的实现方式中，所述IP地址分配装置集成于融合控制功能CCF中，
在所述IP地址分配装置向所述UE发送IP地址以及所述IP地址的移动性属性之前，所述UE还用于：向所述CCF发送IP地址请求消息；所述CCF用于：确定所述UE的IP地址移动性属性，根据所述UE的IP地址移动性属性，选择对应的转发装置；
所述CCF还用于：向选择的所述转发装置下发转发规则，以便所述转发装置根据所述转发规则处理所述UE发送的对应移动性属性的IP报文；
所述IP地址分配装置具体用于：
所述CCF向所述UE返回IP地址响应消息，所述IP地址响应消息携带所述IP地址以及所述IP地址的移动性属性。
结合第三方面的第四种可能实现方式，在第五种可能的实现方式中，所述IP地址请求消息为附着请求消息或者PDN连接建立请求消息，所述IP地址响应消息为附着响应消息或者PDN连接建立响应消息。
结合第三方面的第四种可能实现方式，在第六种可能的实现方式中，所述IP地址请求消息为DHCP请求消息或者路由器请求，所述IP地址响应消息为DHCP应答消息或路由器通告消息。
结合第三方面的第六种可能实现方式，在第七种可能的实现方式中，还包括基站，
在所述CCF向所述UE返回DHCP应答消息或者路由器通告消息之后，所述CCF还用于：向基站发送承载建立请求消息，并通过所述基站向所述UE 发送会话管理请求消息，所述会话管理请求消息携带业务流模板TFT信息，
所述基站向所述CCF发送承载建立应答消息；
所述UE向所述转发装置传输与所述TFT信息匹配的IP报文。
结合第三方面的第四种可能实现方式，在第八种可能的实现方式中，所述IP地址请求请求消息中携带所述UE的移动性偏好信息，
所述CCF还用于：根据所述UE的移动性偏好信息确定UE的IP地址移动性属性。
结合第三方面的第四或第八种可能实现方式，在第九种可能的实现方式中，所述IP地址移动性属性包括提供移动性和不提供移动性，所述转发装置包括与提供移动性相对应的第一转发装置以及与不提供移动性相对应的第二转发装置。
第四方面，提供一种用户设备UE，所述UE包括接收模块和处理模块，其中：
所述接收模块，用于接收由IP地址分配装置分配的IP地址以及所述IP地址的移动性属性；
所述处理模块，用于选择与自身移动性需求对应的IP地址发起业务。
结合第四方面，在第一种可能的实现方式中，所述UE还包括发送模块，
在所述接收模块接收由IP地址分配装置分配的IP地址以及所述IP地址的移动性属性之前，所述发送模块，用于向MME发送附着请求消息或者PDN连接建立请求消息；
所述接收模块还用于：接收所述MME通过基站返回的附着接受消息或PDN连接建立请求消息，所述附着接受消息或所述PDN连接建立请求消息中携带所述IP地址以及所述IP地址的移动性属性。
结合第四方面的第一种实现方式，在第二种可能的实现方式中，所述附着请求消息中携带所述UE的移动性偏好信息，和/或，所述PDN连接建立请求消息中携带所述UE的移动性偏好信息，以使所述MME根据移动性偏好信息确定移动性属性。
结合第四方面，在第三种可能的实现方式中，所述IP地址分配装置包括第一IP地址分配装置和第二IP地址分配装置，
所述接收模块具体用于：
接收由第一IP地址分配装置和/或第二IP地址分配装置分配的IP地址以 及所述IP地址的移动性属性；
其中，所述IP地址的移动性属性包括提供移动性和不提供移动性，其中，提供移动性与所述第一IP地址分配装置对应，不提供移动性与所述第二IP地址分配装置对应。
结合第四方面或其第三种实现方式，在第四种可能的实现方式中，所述IP地址分配装置集成于融合控制功能CCF中，
在所述接收模块接收由IP地址分配装置分配的IP地址以及所述IP地址的移动性属性之前，所述发送模块还用于：向所述CCF发送IP地址请求消息；
所述接收模块，用于接收所述CCF返回的IP地址响应消息，所述IP地址响应消息中携带所述IP地址以及所述P地址的移动性属性。
结合第四方面的第四种实现方式，在第五种可能的实现方式中，所述IP地址请求消息为附着请求消息或者PDN连接建立请求消息，所述IP地址响应消息为附着响应消息或者PDN连接建立响应消息。
结合第四方面的第四种实现方式，在第六种可能的实现方式中，所述IP地址请求消息为DHCP请求消息或者路由器请求，所述IP地址响应消息为DHCP应答消息或路由器通告消息。
结合第四方面的第六种实现方式，在第七种可能的实现方式中，在所述接收模块接收所述CCF返回的DHCP应答消息或者路由器通告消息之后，所述接收模块还用于：接收会话管理请求消息，所述会话管理请求消息携带业务流模板TFT信息，
所述发送模块还用于：传输与所述TFT信息匹配的IP报文。
结合第四方面的第四种实现方式，在第八种可能的实现方式中，所述IP地址请求请求消息中携带所述UE的移动性偏好信息，以使所述CCF根据UE的移动性偏好信息确定UE的IP地址移动性属性。
本发明实施例提供的IP地址分配方法、网络系统和UE，通过在分配IP地址时指明其对应的移动性属性，能够更简单方便地让终端根据自身的移动性需求来选择合适的IP地址发起业务，避免维护APN列表带来的终端需要适配不同运营商的问题。
附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所 需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本发明实施例提供的一种IP地址分配的方法的流程图；
图2是本发明实施例提供的一种IP地址分配的方法的流程图；
图3是本发明实施例通过的一种IP地址分配的方法的示意图；
图4是本发明实施例通过的一种IP地址分配的方法的示意图；
图5是本发明实施例通过的一种IP地址分配的方法的示意图；
图6A是本发明实施例提供的一种网络系统的结构框图；
图6B是本发明实施例提供的另一种网络系统的结构框图；
图7A是本发明实施例提供的一种用户设备(UE)的结构框图；
图7B是本发明实施例提供的另一种UE的结构框图。
具体实施方式
为了更好地理解本发明，下面先对本发明中涉及到的一些术语进行说明。 基站：本文中可以为演进型基站(evolved Node B,eNB)，用于实现无线有关的功能。
移动性管理实体(Mobility Management Entity，MME)：负责用户的移动性管理，包括用户上下文和移动状态管理，分配用户临时身份标识，认证和授权用户；
服务网关(Serving Gateway，S-GW)：是3GPP接入网络间的转发面锚点，终止与eNB的接口，通过与基站以及分组数据网络网关(Packet Data Network Gateway，PGW)之间的传输隧道实现UE报文转发；
分组数据网络网关(Packet Data Network Gateway，PGW)：是3GPP接入网络和非3GPP接入网络之间的转发面锚点，和外部分组数据网络(PDN：Packet Data Network)的接口；具有IP地址分配功能，具有承载管理功能，可以建立与基站之间多个传输隧道(通过SGW)；
网关用户面(GW-U):具有用户报文转发，封装，统计等功能；
融合控制功能(Converged control function,CCF)：集成了MME和网关控制面等功能，除了负责用户的移动性管理，还具有IP地址分配，选择网关用户面设备，承载管理，生成网关用户面转发规则等功能。
相关技术中，不同APN连接的是同一网络(比如internet)，只是提供IP地址的网关不同，其对应的移动性支持程度不同。本申请中利用一个通用的跨运营商的IP移动性属性来选择不同的网关并提供不同的移动性支持，从而避免了在手机上配置不同运营商APN列表导致的配置复杂以及无法及时动态更新的问题。
为使本发明的目的、技术方案和优点更加清楚，下面将结合附图对本发明实施方式作进一步地详细描述。
图1是本发明实施例提供的一种IP地址分配的方法的流程图。参照图1，本发明实施例提供的IP地址分配的方法所述方法包括：
11、IP地址分配装置向UE发送IP地址以及所述IP地址的移动性属性；
12、所述UE选择与自身移动性需求对应的IP地址发起业务。
其中，本文中的移动性属性是指当用户移动后，网络是否维持该IP地址不变，即会话连续性。本申请中的移动性属性可包括以下两种：提供移动性和不提供移动性。当然，也可以有其他划分方式，例如对移动性属性进行高(即，对应于提供移动性)和低(即，对应于不提供移动性)划分。当提供移动性时或移动性属性为高时，维持IP地址不变，即保证会话的连续性；而当移动性属性为低时或不提供移动性时，不维持IP地址不变，即不保证会话的连续性。
本发明实施例提供的IP地址分配的方法，由于IP的移动性属性是通用的，跨运营商的，所以UE就不需要为每个运营商单独维护其APN含义列表，而只需要记录分配的IP地址以及其对应的属性即可，简化了手机实现，当手机连接到新的运营商时，只需再次进行IP地址分配过程即可更新及记录，不需要额外的APN提供服务列表更新，解决了相关技术更新不及时导致IP无法选择的问题。
可选地，在本发明的一个实施例中，在步骤11所述IP地址分配装置向所述UE发送IP地址以及所述IP地址的移动性属性之前，所述方法还包括：
所述UE向MME发送附着请求消息或者PDN连接建立请求消息；
所述MME基于所述附着请求消息或者PDN连接建立请求消息，确定所述UE的IP地址移动性属性，选择与IP地址移动性属性相应的IP地址分配装置，向所述IP地址分配装置发送创建会话请求消息.
相应地，步骤12中所述IP地址分配装置向所述UE发送IP地址以及所述IP地址的移动性属性可包括：
所述IP地址分配装置在接收到来自所述MME的创建会话请求消息后，向所述MME发送创建会话应答消息，所述创建会话应答消息中携带所述IP地址以及所述IP地址的移动性属性；
所述MME通过基站向所述UE返回附着接受消息或者PDN连接建立请求消息，所述附着接受消息或者或者PDN连接建立请求中携带所述IP地址以及所述IP地址的移动性属性。
其中，所述附着请求消息中可携带所述UE的移动性偏好信息，和/或，所述PDN连接建立请求消息中可携带所述UE的移动性偏好信息。这样一来，所述MME即可根据移动性偏好信息确定移动性属性。
本发明实施例提供的IP地址分配的方法可应用于EPS网络中。在应用于元EPS网络中的情形下，所述IP地址分配装置可以为PGW或LPGW。当所述IP地址分配装置为PGW时，其对应的IP地址移动性属性为提供移动性；当所述IP地址分配装置为LPGW时，其对应的IP地址移动性属性为不提供移动性
当然，可选地，在本发明的一个实施例中，所述IP地址分配装置可以包括多个IP地址分配装置。例如，所述IP地址分配装置可以包括第一IP地址分配装置和第二IP地址分配装置。第一IP地址分配装置和第二IP地址分配装置分别向所述UE分配第一IP地址及其对应的移动性属性，和第二IP地址及其对应的移动性属性。所述第一IP地址分配装置分配的移动性属性可以和所述第二IP地址分配的移动性属性不同。例如，在本发明实施例中，所述第一IP地址分配装置可以为PGW(提供移动性)，所述第二IP地址分配装置可以为LPGW(不提供移动性)；或者，所述所述第一IP地址分配装置可以为LPGW(不提供移动性)，所述第二IP地址分配装置可以为PGW(提供移动性)。
在本发明实施例中，当所述IP地址分配装置包括第一IP地址分配装置和第二IP地址分配装置时，所述附着请求消息中可携带所述UE的移动性偏好信息并发送给MME；所述PDN连接建立请求消息中也可携带所述UE的移动性偏好信息并发送给MME。如此，所述MME即可根据接收的所述UE的移动性偏好信息更便捷地选择相应的网关。
在本发明的另一个实施例中，本发明实施例提供的IP地址分配的方法可应用于控制面和用户面分离后的网络架构。在此网络架构中，所述IP地址分配装置集成于融合控制功能(CCF)中。本发明实施例提供的IP地址分配的方法 除了包括上述步骤11和步骤12之外，在步骤11所述IP地址分配装置向所述UE发送IP地址以及所述IP地址的移动性属性之前，还可包括：
所述UE向所述CCF发送IP地址请求消息，所述CCF确定所述UE的IP地址移动性属性，根据所述UE的IP地址移动性属性，选择对应的转发装置；
所述CCF向选择的所述转发装置下发转发规则，以便所述转发装置根据所述转发规则处理所述UE发送的对应移动性属性的IP报文。
相应地，步骤11中所述IP地址分配装置向所述UE发IP地址以及所述IP地址的移动性属性可包括：
所述CCF向所述UE返回IP地址响应消息，所述IP地址响应消息携带所述IP地址以及所述IP地址的移动性属性。
在本发明实施例中，可选地，所述IP地址请求消息可以为附着请求消息或者PDN连接建立请求消息，所述IP地址响应消息可以为附着响应消息或者PDN连接建立响应消息。
在本发明实施例中，可选地，所述IP地址请求消息可以为DHCP请求消息或者路由器请求，所述IP地址响应消息可以为DHCP应答消息或路由器通告消息。
进一步地，在所述CCF向所述UE返回DHCP应答消息或者路由器通告消息之后，所述方法还可包括：
所述CCF向基站发送承载建立请求消息，并通过所述基站向所述UE发送会话管理请求消息，所述会话管理请求消息携带业务流模板TFT信息，
所述基站向所述CCF发送承载建立应答消息；
所述UE向所述转发装置传输与所述TFT信息匹配的IP报文。
在本发明实施例提供的IP地址分配的方法应用于控制面和用户面分离后的网络架构的情况下，所述IP地址请求请求消息中可携带所述UE的移动性偏好信息，所述CCF可根据UE的移动性偏好信息确定UE的IP地址移动性属性。
其中，所述IP地址移动性属性可包括提供移动性和不提供移动性，所述转发装置可包括与提供移动性相对应的第一转发装置以及与不提供移动性相对应的第二转发装置。
本发明实施例提供的IP地址分配的方法，用户面的IP地址分配协议报文转发给CCF(控制面)并触发所述CCF(控制面)选择新的转发装置(网关转 发面)并分配IP地址，从而使得UE可以用一个PDN连接同时分配两个移动属性不同的IP地址，避免了强制要求UE支持多PDN连接，兼容了仅支持单PDN连接通过用户面IP地址分配协议分配多个IP地址的终端。
图2是本发明实施例提供的另一种IP地址分配的方法的流程图。参照图2，本发明实施例提供的IP地址分配的方法可包括：
21、UE接收由IP地址分配装置分配的IP地址以及所述IP地址的移动性属性；
22、所述UE选择与自身移动性需求对应的IP地址发起业务。
其中，本文中的移动性属性是指当用户移动后，网络是否维持该IP地址不变，即会话连续性。本申请中的移动性属性可包括以下两种：提供移动性和不提供移动性。当然，也可以有其他划分方式，例如对移动性属性进行高(即，对应于提供移动性)和低(即，对应于不提供移动性)划分。当提供移动性时或移动性属性为高时，维持IP地址不变，即保证会话的连续性；而当移动性属性为低时或不提供移动性时，不维持IP地址不变，即不保证会话的连续性。
本发明实施例提供的IP地址分配的方法，由于IP的移动性属性是通用的，跨运营商的，所以UE就不需要为每个运营商单独维护其APN含义列表，而只需要记录分配的IP地址以及其对应的属性即可，简化了手机实现，当手机连接到新的运营商时，只需再次进行IP地址分配过程即可更新及记录，不需要额外的APN提供服务列表更新，解决了相关技术更新不及时导致IP无法选择的问题。
可选地，在本发明的一个实施例中，本发明实施例提供的IP地址分配的方法可应用于演进分组系统(EPS)网络中。此时，在步骤21中所述UE接收由IP地址分配装置分配的IP地址以及所述IP地址的移动性属性之前，本发明实施例提供的IP地址分配的方法除了包括上述步骤21和步骤22之外，还可包括：
所述UE向MME发送附着请求消息或者PDN连接建立请求消息；
所述UE接收所述MME通过基站返回的附着接受消息或PDN连接建立请求消息，所述附着接受消息或所述PDN连接建立请求消息中携带所述IP地址以及所述IP地址的移动性属性。
在本发明实施例中，可选地，所述附着请求消息中携带所述UE的移动性 偏好信息，和/或，所述PDN连接建立请求消息中携带所述UE的移动性偏好信息，以使所述MME根据移动性偏好信息确定移动性属性。
可选地，在本发明的一个实施例中，所述IP地址分配装置可包括第一IP地址分配装置和第二IP地址分配装置。此时，步骤22中所述UE接收由IP地址分配装置分配的IP地址以及所述IP地址的移动性属性包括：
所述UE接收由第一IP地址分配装置和/或第二IP地址分配装置分配的IP地址以及所述IP地址的移动性属性；
其中，所述IP地址的移动性属性包括提供移动性和不提供移动性，提供移动性与所述第一IP地址分配装置对应，不提供移动性与所述第二IP地址分配装置对应。
在本发明的另一个实施例中，本发明实施例提供的IP地址分配的方法可应用于控制面和用户面分离后的网络架构。在此网络架构中，所述IP地址分配装置集成于融合控制功能(CCF)中。在此情形下，在步骤21中所述UE接收由IP地址分配装置分配的IP地址以及所述IP地址的移动性属性之前，本发明实施例提供的IP地址分配的方法还可包括：
所述UE向所述CCF发送IP地址请求消息；
所述UE接收所述CCF返回的IP地址响应消息，所述IP地址响应消息中携带所述IP地址以及所述IP地址的移动性属性。
在本发明实施例中，所述IP地址请求请求消息中可携带所述UE的移动性偏好信息，以使所述CCF根据UE的移动性偏好信息确定UE的IP地址移动性属性。
其中，可选地，所述IP地址请求消息可以为附着请求消息或者PDN连接建立请求消息，所述IP地址响应消息可以为附着响应消息或者PDN连接建立响应消息。
其中，可选地，所述IP地址请求消息可以为DHCP请求消息或者路由器请求，所述IP地址响应消息可以为DHCP应答消息或路由器通告消息。
可选地，在所述IP地址请求消息为DHCP请求消息或者路由器请求，所述IP地址响应消息为DHCP应答消息或路由器通告消息的情况下，在所述UE接收所述CCF返回的DHCP应答消息或者路由器通告消息之后，所述方法还可包括：
所述UE接收会话管理请求消息，所述会话管理请求消息携带业务流模板 TFT信息，
所述UE传输与所述TFT信息匹配的IP报文。
本发明实施例提供的IP地址分配的方法，用户面的IP地址分配协议报文转发给CCF(控制面)并触发所述CCF(控制面)选择新的转发装置(网关转发面)并分配IP地址，从而使得UE可以用一个PDN连接同时分配两个移动属性不同的IP地址，避免了强制要求UE支持多PDN连接，兼容了仅支持单PDN连接通过用户面IP地址分配协议分配多个IP地址的终端。
为了更好地理解本发明的技术方案，下面以几个具体实施例为例来对本发明提供的IP地址分配的方法进行进一步阐释。
图3是本发明实施例提供的一种IP地址分配的方法的示意图。参照图3，所述方法可应用于传统的EPS网络，包括：
331、UE经eNB向MME发送附着请求消息，所述附着请求消息中可选的携带UE优选的IP地址的移动性属性(可以通过扩展PDN类型参数携带)，针对本实施例，优选携带的是提供移动性；
332、MME认证UE，如果UE认证通过，则和UE之间建立安全上下文，由于没有携带加密选项传送标志，MME选取用户签约里缺省APN和UE优选的IP地址移动性属性选择网关，如果UE没有携带IP地址移动性属性，则MME可以根据签约里的缺省优选IP地址移动属性选择网关，如果优选IP地址移动性属性为高移动性且签约允许，则选择集中部署的网关为该用户分配IP地址，否则选择分布式部署的网关为该用户分配IP地址，MME根据选择的分组网关以及用户位置选择SGW。注意如果UE优选高移动性，但是用户签约只允许低移动性，则MME以签约为主，即以低移动性选择网关。
MME向选择的SGW发送创建会话请求消息，携带PDN类型、APN、国际移动识别码(international mobile subscriber identity，IMSI)、PGW地址等信息，可选的携带IP地址的移动性属性。
333、SGW根据步骤332里的PGW地址，向PGW发送创建会话请求消息，携带PDN类型，APN，IMSI，以及隧道标识(Tunnel Endpoint Identifier，TEID)等信息，可选的携带IP地址的移动性属性；
334、PGW根据PDN类型，APN信息分配对应网络里的IP地址，向SGW返回创建会话应答消息，携带PGW分配的TEID(隧道标识)信息和分配的 IP地址，以及该分配IP地址的移动性属性(该属性可以通过扩展PCO参数携带)，由于该网关部署位置较高，所以其分配的IP地址的移动性属性为高；
335、SGW向MME返回创建会话应答消息；
336、MME向eNB发送初始上下文建立请求消息，通过基站向UE返回附着接受消息，包含APN信息，IP地址信息以及该IP地址的移动性属性；此时UE记录IP及其对应的移动性属性；
337、eNB和UE之间重新配置RRC连接，以传送用户面报文；
338、eNB向MME返回初始上下文建立应答消息，包含eNB分配的TEID，该TEID用于创建SGW和eNB之间的下行转发隧道；
339、MME向SGW发送修改承载请求消息，包含eNB分配的TEID；
340、SGW返回修改承载应答消息，此后UE可以发送和接受IP报文，如果UE上的应用都需要移动性支持，即移动位置IP地址维持不变，则UE不在发起后续流程。如果UE上部分应用需求移动性支持，部分不需要移动性支持且仅访问本地服务，则发起后续流程；
341、UE经eNB向MME发送PDN连接建立请求消息，可以直接携带APN信息(和上述步骤3366里返回给UE的APN信息相同)，以及优选的IP地址移动性属性(可以通过扩展PDN类型参数携带)，针对本实施例，该移动性属性为低，既不需要始终保持IP不变；
342、MME根据消息里携带的APN和UE优选的IP地址移动性属性选择网关(仍需签约检查)，针对本例选择对应的本地网关；MME向步骤332里选择的SGW发送创建会话请求消息，携带PDN类型，APN，IMSI，本地网关地址等信息；
343、SGW根据步骤334里的PGW地址，向本地网关发送创建会话请求消息，携带PDN类型，APN，IMSI，以及TEID(隧道标识)等信息，可选的携带优选的IP地址移动属性；
344、本地网关根据PDN类型，APN信息分配对应网络里的IP地址，向SGW返回创建会话应答消息，携带本地网关分配的TEID(隧道标识)信息和分配的IP地址，以及该分配IP地址的移动性属性，由于是本地网关，所以其分配的IP地址的移动性属性为低；
345、SGW向MME返回创建会话应答消息；
346、MME向eNB发送承载建立请求消息，通过基站向UE返回PDN连 接建立响应消息，所述PDN连接建立响应消息包含APN信息，IP地址信息以及该IP地址的移动性属性；此时UE记录IP及其对应的移动性属性；
347、eNB和UE之间重新配置RRC连接，以传送用户面报文；
348、eNB向MME返回承载建立应答消息；
349、MME向SGW发送修改承载请求消息；
350、SGW返回修改承载应答消息，此时UE有两个IP地址，UE上的应用根据自己的需求，选择不同的IP地址发起业务。
需要注意的是这两个APN发起顺序不是固定的，也可以先发起到本地网关的网络连接，再发起到PGW的网络连接。
关于手机上的应用如何选择不同的IP发起业务，一种可能的实现方式如下，手机操作系统保存当前连接的APN以及对应的IP地址，由于不同运营商其APN命名是不一样的，比如中国移动可能给被本地服务的APN命名为A，给锚定不变的APN命名为B，而中国联通给本地服务的APN命名为X，给锚定不变的APN命名为Y，而由于手机可能连接不同的运营商，所以手机操作系统要维护所有运营商的APN列表以及其对应的属性。当手机上的APP发起业务时，调用操作系统提供的API，请求特定属性的IP，比如APP1可能需要IP不变，则手机操作系统根据当前连接的PLMN以及该PLMN对应的APN列表，返回其对应属性的IP地址，APP获取特定属性IP后，调用套接字(socekt)提供的API，发起IP业务，API里可以指定该IP业务所需的源地址。其他可能的实现方式还包括应用维护所有运营商的APN列表以及其对应的属性。
通过本实施例可以看出，由于IP的移动性属性是通用的，跨运营商的，所以手机操作系统或者应用就不需要为每个运营商单独维护其APN含义列表，而只需要记录分配的IP地址以及其对应的属性即可，简化了终端(例如手机)的实现，当终端连接到新的运营商时，只需再次进行IP地址分配过程即可更新及记录，不需要额外的APN提供服务列表更新，解决了现有技术更新不及时导致IP无法选择的问题。另外通过扩展socket编程接口提供移动性属性，可以简化手机应用的实现，避免手机应用选择源IP带来的额外处理，简化了应用的实现。
图4是本发明实施例提供的一种IP地址分配的方法的示意图。参照图4，所述方法可应用于控制面和用户名相分离的网络架构，包括：
441、UE经eNB向CCF发送附着请求消息，可选的携带UE的移动性偏好信息(可以通过扩展PCO参数携带)；
442、CCF认证UE，如果UE认证通过，则和UE之间建立安全上下文，由于没有携带加密选项传送标志，CCF选取用户签约里缺省APN以及UE携带的优选移动性属性，选择对应的转发装置(网关转发面)，如果优选的IP地址移动属性为高,则选择集中部署的转发装置(网关转发面),否则选择分布式部署的转发装置(网关转发面)。选择好转发装置(网关转发面)后，CCF分配用户的IP地址，并向转发装置(网关转发面)下发上行转发规则，指示转发装置(网关转发面)如何处理UE发送的IP报文。
443、CCF向eNB发送初始上下文建立请求消息，包含分配的TEID，通过基站向UE返回附着接受消息，包括APN，分配的IP地址以及该地址对应的移动性属性；
444、eNB和UE之间重新配置RRC连接，建立无线承载以传送用户面报文；
445、eNB向CCF返回初始上下文建立应答消息，包含eNB分配的TEID；
46、CCF向转发装置(网关转发面)下发下行转发规则，指示转发装置(网关转发面)如何处理发送给UE的IP报文，在收到发送给UE的IP报文后，封装eNB分配的TEID并发送给基站；如果UE上的应用都需要移动性支持，即移动位置IP地址维持不变，则UE不在发起后续流程。如果UE上部分应用需求移动性支持，部分不需要移动性支持且仅访问本地服务，则发起后续流程；
447、UE经eNB向CCF发送PDN连接建立请求消息，可以直接携带APN信息(和上述步骤443里返回给UE的APN信息相同)，以及可选的IP地址的移动性属性；
448、CCF根据PDN连接消息可选的IP地址移动性属性，以及用户签约信息(是否允许分配该类型的地址)，选择对应的转发装置(网关转发面)并分配用户的IP地址2，针对本例选择位置较低(本地)的转发装置(网关转发面)；CCF(网关控制面)向转发装置(网关转发面)下发上行转发规则，指示转发装置(网关转发面)如何处理UE发送的IP报文(源地址为IP地址2)；
449、CCF向eNB发送承载建立请求消息，包含控制面分配的TEID，通过基站向UE返回PDN连接建立响应消息，包含APN信息，IP地址信息以及该IP地址的移动性属性；
450、eNB和UE之间重新配置RRC连接，建立无线承载以传送用户面报文；
451、eNB向CCF返回承载建立应答消息，包含eNB分配的TEID；
452、CCF向转发装置(网关转发面)下发下行转发规则，指示转发装置(网关转发面)如何处理发送给UE的IP报文(目的地址为IP地址2)，在收到发送给UE的IP报文后，封装eNB分配的TEID并发送给基站；此时UE有两个IP地址，UE上的应用根据自己的需求，选择不同的IP地址发起业务。
通过本实施例可以看出，由于IP的移动性属性是通用的，跨运营商的，所以手机操作系统或者应用就不需要为每个运营商单独维护其APN含义列表，而只需要记录分配的IP地址以及其对应的属性即可，简化了手机实现，当手机连接到新的运营商时，只需再次进行IP地址分配过程即可更新及记录，不需要额外的APN提供服务列表更新，解决了现有技术更新不及时导致IP无法选择的问题。另外通过扩展套接字(socket)编程接口提供移动性属性，可以简化手机应用的实现，避免手机应用选择源IP带来的额外处理，简化了应用的实现。
图5是本发明实施例提供的一种IP地址分配的方法的示意图。参照图5，所述方法可应用于控制面和用户名相分离的网络架构，包括：
541、UE经eNB向CCF发送附着请求消息，可选地携带UE的移动性偏好信息；
542、CCF认证UE，如果UE认证通过，则和UE之间建立安全上下文，由于没有携带加密选项传送标志也没有携带优选的IP地址移动属性，CCF选取用户签约里缺省APN和缺省的IP地址移动性属性选择对应的转发装置(网关转发面)，在选择好转发装置(网关转发面)后，CCF分配用户的IP地址1，并向转发装置(网关转发面)下发上行转发规则，指示网关转发面如何处理UE发送的IP报文，在上行转发规则里要指示网关转发面检测到DHCP或者IPV6的无状态地址自动配置协议消息后，要上报给CCF(控制面)；
543、CCF向eNB发送初始上下文建立请求消息，包含控制面分配的TEID，通过基站向UE返回附着接受消息，包括APN，分配的IP地址以及该地址对应的移动性属性；
544、eNB和UE之间重新配置RRC连接，建立无线承载以传送用户面报 文；
545、eNB向CCF返回初始上下文建立应答消息，包含eNB分配的TEID；
546、CCF向网关转发面下发下行转发规则，指示网关转发面如何处理发送给UE的IP报文，在收到发送给UE的IP报文后，封装eNB分配的TEID并发送给基站；如果UE上的应用都需要移动性支持，即移动位置IP地址维持不变，则UE不在发起后续流程。如果UE上部分应用需求移动性支持，部分不需要移动性支持且仅访问本地服务，则发起后续流程；
547、UE在用户面发起额外的地址分配流程(DHCP或者IPV6的无状态地址自动配置协议)，携带UE优选的IP地址属性，针对本例例如低移动性；
548、转发装置(网关转发面)收到DHCP或者IPV6的无状态地址自动配置协议报文后，根据步骤542里的上行转发规则，将报文发送给CCF；
549、CCF根据上报报文里的优选IP地址属性，以及用户签约信息(是否允许分配该类型的地址)，选择对应的转发装置(网关转发面)并分配用户的IP地址2，针对本例选择位置较低(本地)的网关转发面；CCF(网关控制面)向转发装置(网关转发面)下发上行转发规则，指示转发装置(网关转发面)如何处理UE发送的IP报文(源地址为IP地址2)；
550、CCF封装DHCP响应或者IPV6的无状态地址自动配置协议响应报文发送给转发装置(网关转发面)；
551、转发装置(网关转发面)通过用户面将DHCP响应或者IPV6的无状态地址自动配置协议响应报文发送给UE，包含分配的IP地址以及该地址对应的移动属性；
552、CCF向eNB发送承载建立请求消息，包含分配的TEID，通过基站向UE发送会话管理请求消息，包含TFT信息，指示UE在该承载发送源地址为IP地址2的报文；
553、eNB和UE之间重新配置RRC连接，建立无线承载以传输用户面报文；
554、eNB向CCF返回承载建立应答消息，包含eNB分配的TEID；
555、CCF向转发装置(网关转发面)下发下行转发规则，指示转发装置(网关转发面)如何处理发送给UE的IP报文(目的地址为IP地址2)，在收到发送给UE的IP报文后，封装eNB分配的TEID并发送给基站；此时UE有两个IP地址，UE上的应用根据自己的需求，选择不同的IP地址发起业务。
本实施例除了具有图3所示实施例所具有的效果外，还利用转发装置(网关转发面)的可编程性，将用户面的IP地址分配协议报文转发给CCF(控制面)并触发CCF选择新的转发装置(网关转发面)并分配IP地址，从而使得UE可以用一个PDN连接同时分配两个移动属性不同的IP地址，避免了强制要求UE支持多PDN连接，兼容了仅支持单PDN连接通过用户面IP地址分配协议分配多个IP地址的终端。
图6A是本发明实施例提供的一种用于IP地址分配的网络系统。参照图6A，本发明实施例提供的网络系统600可包括IP地址分配装置601和UE 602。其中：
所述IP地址分配装置601，用于向所述UE发送IP地址以及所述IP地址的移动性属性；
所述UE 602，用于从所述IP地址分配装置的IP地址中选择与自身移动性需求对应的IP地址发起业务。
本发明实施例提供的IP地址分配的方法，由于IP的移动性属性是通用的，跨运营商的，所以UE就不需要为每个运营商单独维护其APN含义列表，而只需要记录分配的IP地址以及其对应的属性即可，简化了手机实现，当手机连接到新的运营商时，只需再次进行IP地址分配过程即可更新及记录，不需要额外的APN提供服务列表更新，解决了相关技术更新不及时导致IP无法选择的问题。
可选地，在本发明的一个实施例中，参照图6B，所述网络系统600还包括MME 603和基站604。
在所述IP地址分配装置601向所述UE 602发送IP地址以及所述IP地址的移动性属性之前，所述UE 602还用于：向MME 603发送附着请求消息或者PDN连接建立请求消息；
所述MME 603，用于基于所述附着请求消息或者PDN连接建立请求消息，确定所述UE 602的IP地址移动性属性，选择与IP地址移动性属性相应的IP地址分配装置，向所述IP地址分配装置发送创建会话请求消息；
所述IP地址分配装置601具体用于：
所述IP地址分配装置601在接收到来自所述MME的创建会话请求消息后，向所述MME发送创建会话应答消息，所述创建会话应答消息中携带所述 IP地址以及所述IP地址的移动性属性；
所述MME 603还用于：通过基站向所述UE返回附着接受消息或者PDN连接建立请求消息，所述附着接受消息或者或者PDN连接建立请求中携带所述IP地址以及所述IP地址的移动性属性。
可选地，所述附着请求消息中携带所述UE的移动性偏好信息，和/或，所述PDN连接建立请求消息中携带所述UE的移动性偏好信息，
所述MME还用于：根据移动性偏好信息确定移动性属性。
可选地，所述IP地址分配装置为PGW，其对应的IP地址移动性属性为提供移动性，或者所述IP地址分配装置为LPGW，其对应的IP地址移动性属性为不提供移动性；
在本发明的另一个实施例中，可选地，所述IP地址分配装置601集成于融合控制功能CCF中，
在所述IP地址分配装置601向所述UE 602发送IP地址以及所述IP地址的移动性属性之前，所述UE 602还用于：向所述CCF发送IP地址请求消息；所述CCF用于：确定所述UE的IP地址移动性属性，根据所述UE的IP地址移动性属性，选择对应的转发装置；
所述CCF还用于：向选择的所述转发装置下发转发规则，以便所述转发装置根据所述转发规则处理所述UE发送的对应移动性属性的IP报文；
所述IP地址分配装置具体用于：
所述CCF向所述UE返回IP地址响应消息，所述IP地址响应消息携带所述IP地址以及所述IP地址的移动性属性。
可选地，所述IP地址请求消息为附着请求消息或者PDN连接建立请求消息，所述IP地址响应消息为附着响应消息或者PDN连接建立响应消息。
可选地，所述IP地址请求消息为DHCP请求消息或者路由器请求，所述IP地址响应消息为DHCP应答消息或路由器通告消息。
可选地，在本发明的一个实施例中，在所述CCF向所述UE返回DHCP应答消息或者路由器通告消息之后，所述CCF还用于：向基站604发送承载建立请求消息，并通过所述基站604向所述UE 602发送会话管理请求消息，所述会话管理请求消息携带业务流模板TFT信息，
所述基站604向所述CCF发送承载建立应答消息；
所述UE 602向所述转发装置传输与所述TFT信息匹配的IP报文。
可选地，所述IP地址请求请求消息中携带所述UE的移动性偏好信息，
所述CCF还用于：根据所述UE 602的移动性偏好信息确定UE的IP地址移动性属性。
可选地，所述IP地址移动性属性包括提供移动性和不提供移动性，所述转发装置包括与提供移动性相对应的第一转发装置以及与不提供移动性相对应的第二转发装置。
本发明实施例通过在分配IP地址时指明移动性属性，使得终端应用可以根据自己的移动性需求选择不同的源IP传输业务报文，避免了使用多APN带来的终端需要适配不同运营商的问题，简化了终端应用选择源地址的机制。
图7A是本发明实施例提供的一种用户设备UE的结构框图。参照图7A，本发明实施例提供的UE 700包括接收模块701和处理模块702，其中：
所述接收模块701，用于接收由IP地址分配装置分配的IP地址以及所述IP地址的移动性属性；
所述处理模块702，用于选择与自身移动性需求对应的IP地址发起业务。
本发明实施例提供的UE，由于IP的移动性属性是通用的，跨运营商的，所以UE就不需要为每个运营商单独维护其APN含义列表，而只需要记录分配的IP地址以及其对应的属性即可，简化了实现，当UE连接到新的运营商时，只需再次进行IP地址分配过程即可更新及记录，不需要额外的APN提供服务列表更新，解决了相关技术更新不及时导致IP无法选择的问题。
可选地，在本发明的一个实施例中，参照图7B，所述UE 700还可包括发送模块703。在所述接收模块701接收由IP地址分配装置分配的IP地址以及所述IP地址的移动性属性之前，所述发送模块703，用于向MME发送附着请求消息或者PDN连接建立请求消息；
所述接收模块701还用于：接收所述MME通过基站返回的附着接受消息或PDN连接建立请求消息，所述附着接受消息或所述PDN连接建立请求消息中携带所述IP地址以及所述IP地址的移动性属性。
其中，所述附着请求消息中可携带所述UE的移动性偏好信息，和/或，所述PDN连接建立请求消息中可携带所述UE的移动性偏好信息，以使所述MME根据移动性偏好信息确定移动性属性。
可选地，在本发明的一个实施例中，所述IP地址分配装置包括第一IP地 址分配装置和第二IP地址分配装置，所述接收模块701具体用于：
接收由第一IP地址分配装置和/或第二IP地址分配装置分配的IP地址以及所述IP地址的移动性属性；
其中，所述IP地址的移动性属性包括提供移动性和不提供移动性，其中，提供移动性与所述第一IP地址分配装置对应，不提供移动性与所述第二IP地址分配装置对应。
可选地，在本发明的一个实施例中，所述IP地址分配装置集成于融合控制功能CCF中，
在所述接收模块701接收由IP地址分配装置分配的IP地址以及所述IP地址的移动性属性之前，所述发送模块703还用于：向所述CCF发送IP地址请求消息；
所述接收模块701，用于接收所述CCF返回的IP地址响应消息，所述IP地址响应消息中携带所述IP地址以及所述P地址的移动性属性。
可选地，所述IP地址请求消息为附着请求消息或者PDN连接建立请求消息，所述IP地址响应消息为附着响应消息或者PDN连接建立响应消息。
可选地，所述IP地址请求消息为DHCP请求消息或者路由器请求，所述IP地址响应消息为DHCP应答消息或路由器通告消息。
可选地，在所述接收模块接收所述CCF返回的DHCP应答消息或者路由器通告消息之后，所述接收模块701还用于：接收会话管理请求消息，所述会话管理请求消息携带业务流模板TFT信息，
所述发送模块703还用于：传输与所述TFT信息匹配的IP报文。
可选地，所述IP地址请求请求消息中携带所述UE的移动性偏好信息，以使所述CCF根据UE的移动性偏好信息确定UE的IP地址移动性属性。
本发明实施例通过在分配IP地址时指明移动性属性，使得终端应用可以根据自己的移动性需求选择不同的源IP传输业务报文，避免了使用多APN带来的终端需要适配不同运营商的问题，简化了终端应用选择源地址的机制。
需要指出的是，本发明实施例还可提供另一种UE，所述UE包括处理器和接收器。其中：
所述接收器，用于接收由IP地址分配装置分配的IP地址以及所述IP地址的移动性属性；
所述处理器，用于选择与自身移动性需求对应的IP地址发起业务。
可选地，所述UE还包括发送器，在所述接收器接收由IP地址分配装置分配的IP地址以及所述IP地址的移动性属性之前，所述发送器，用于向MME发送附着请求消息或者PDN连接建立请求消息；
所述接收器还用于：接收所述MME通过基站返回的附着接受消息或PDN连接建立请求消息，所述附着接受消息或所述PDN连接建立请求消息中携带所述IP地址以及所述IP地址的移动性属性。
可选地，所述附着请求消息中携带所述UE的移动性偏好信息，和/或，所述PDN连接建立请求消息中携带所述UE的移动性偏好信息，以使所述MME根据移动性偏好信息确定移动性属性。
可选地，所述IP地址分配装置包括第一IP地址分配装置和第二IP地址分配装置，
所述接收器具体用于：
接收由第一IP地址分配装置和/或第二IP地址分配装置分配的IP地址以及所述IP地址的移动性属性；
其中，所述IP地址的移动性属性包括提供移动性和不提供移动性，其中，提供移动性与所述第一IP地址分配装置对应，不提供移动性与所述第二IP地址分配装置对应。
可选地，所述IP地址分配装置集成于融合控制功能CCF中，在所述接收器接收由IP地址分配装置分配的IP地址以及所述IP地址的移动性属性之前，所述发送器还用于：向所述CCF发送IP地址请求消息；
所述接收器，用于接收所述CCF返回的IP地址响应消息，所述IP地址响应消息中携带所述IP地址以及所述P地址的移动性属性。
可选地，所述IP地址请求消息为附着请求消息或者PDN连接建立请求消息，所述IP地址响应消息为附着响应消息或者PDN连接建立响应消息。
可选地，所述IP地址请求消息为DHCP请求消息或者路由器请求，所述IP地址响应消息为DHCP应答消息或路由器通告消息。
可选地，在所述接收器接收所述CCF返回的DHCP应答消息或者路由器通告消息之后，所述接收器还用于：接收会话管理请求消息，所述会话管理请求消息携带业务流模板TFT信息，
所述发送器还用于：传输与所述TFT信息匹配的IP报文。
可选地，所述IP地址请求请求消息中携带所述UE的移动性偏好信息，以使所述CCF根据UE的移动性偏好信息确定UE的IP地址移动性属性。
本发明实施例提供的IP地址分配的方法，能够更简单方便地让终端选择合适的IP地址发起业务，避免维护APN列表带来的终端需要适配不同运营商的问题。
需要说明的是：上述实施例提供的UE仅以上述各功能模块的划分进行举例说明，实际应用中，可以根据需要而将上述功能分配由不同的功能模块完成，即将装置的内部结构划分成不同的功能模块，以完成以上描述的全部或者部分功能。另外，上述实施例提供的IP地址分配的装置与IP地址分配的方法实施例属于同一构思，其具体实现过程详见方法实施例，这里不再赘述。
本领域普通技术人员可以理解实现上述实施例的全部或部分步骤可以通过硬件来完成，也可以通过程序来指令相关的硬件完成，所述的程序可以存储于一种计算机可读存储介质中，上述提到的存储介质可以是只读存储器，磁盘或光盘等。
以上所述仅为本发明的较佳实施例，并不用以限制本发明，凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (38)

  1. 一种IP地址分配的方法，其特征在于，所述方法包括：
    IP地址分配装置向用户设备UE发送IP地址以及所述IP地址的移动性属性；
    所述UE选择与自身移动性需求对应的IP地址发起业务。
  2. 根据权利要求1所述的方法，其特征在于，在所述IP地址分配装置向所述UE发送IP地址以及所述IP地址的移动性属性之前，所述方法还包括：
    所述UE向移动性管理实体MME发送附着请求消息或者分组数据网络PDN连接建立请求消息；
    所述MME基于所述附着请求消息或者PDN连接建立请求消息，确定所述UE的IP地址移动性属性，选择与IP地址移动性属性相应的IP地址分配装置，向所述IP地址分配装置发送创建会话请求消息；
    所述IP地址分配装置向所述UE发送IP地址以及所述IP地址的移动性属性包括：
    所述IP地址分配装置在接收到来自所述MME的创建会话请求消息后，向所述MME发送创建会话应答消息，所述创建会话应答消息中携带所述IP地址以及所述IP地址的移动性属性；
    所述MME通过基站向所述UE返回附着接受消息或者PDN连接建立请求消息，所述附着接受消息或者或者PDN连接建立请求中携带所述IP地址以及所述IP地址的移动性属性。
  3. 根据权利要求2所述的方法，其特征在于，所述附着请求消息中携带所述UE的移动性偏好信息，和/或，所述PDN连接建立请求消息中携带所述UE的移动性偏好信息，所述MME根据移动性偏好信息确定移动性属性。
  4. 根据权利要求1-3任一所述的方法，其特征在于，所述IP地址分配装置为分组数据网关PGW，其对应的IP地址移动性属性为提供移动性，或者所述IP地址分配装置为本地分组数据网关LPGW，其对应的IP地址移动性属性为不提供移动性；
  5. 根据权利要求1所述的方法，其特征在于，所述IP地址分配装置集成于融合控制功能CCF中，
    所述IP地址分配装置向所述UE发送IP地址以及所述IP地址的移动性属性之前，所述方法还包括：
    所述UE向所述CCF发送IP地址请求消息，所述CCF确定所述UE的IP地址移动性属性，根据所述UE的IP地址移动性属性，选择对应的转发装置；
    所述CCF向选择的所述转发装置下发转发规则，以便所述转发装置根据所述转发规则处理所述UE发送的对应移动性属性的IP报文；
    所述IP地址分配装置向所述UE发IP地址以及所述IP地址的移动性属性包括：
    所述CCF向所述UE返回IP地址响应消息，所述IP地址响应消息携带所述IP地址以及所述IP地址的移动性属性。
  6. 根据权利要求5所述的方法，其特征在于，所述IP地址请求消息为附着请求消息或者PDN连接建立请求消息，所述IP地址响应消息为附着响应消息或者PDN连接建立响应消息。
  7. 根据权利要求5所述的方法，其特征在于，所述IP地址请求消息为DHCP请求消息或者路由器请求，所述IP地址响应消息为DHCP应答消息或路由器通告消息。
  8. 根据权利要求7所述的方法，其特征在于，在所述CCF向所述UE返回DHCP应答消息或者路由器通告消息之后，所述方法还包括：
    所述CCF向基站发送承载建立请求消息，并通过所述基站向所述UE发送会话管理请求消息，所述会话管理请求消息携带业务流模板TFT信息，
    所述基站向所述CCF发送承载建立应答消息；
    所述UE向所述转发装置传输与所述TFT信息匹配的IP报文。
  9. 根据权利要求5所述的方法，其特征在于，所述IP地址请求请求消息中携带所述UE的移动性偏好信息，所述CCF根据UE的移动性偏好信息确定UE的IP地址移动性属性。
  10. 根据权利要求5或9所述的方法，其特征在于，所述IP地址移动性属性包括提供移动性和不提供移动性，所述转发装置包括与提供移动性相对应的第一转发装置以及与不提供移动性相对应的第二转发装置。
  11. 一种IP地址分配的方法，其特征在于，所述方法包括：
    用户设备UE接收由IP地址分配装置分配的IP地址以及所述IP地址的移动性属性；
    所述UE选择与自身移动性需求对应的IP地址发起业务。
  12. 根据权利要求11所述的方法，其特征在于，在所述UE接收由IP地址 分配装置分配的IP地址以及所述IP地址的移动性属性之前，所述方法还包括：
    所述UE向移动性管理实体MME发送附着请求消息或者分组数据网络PDN连接建立请求消息；
    所述UE接收所述MME通过基站返回的附着接受消息或PDN连接建立请求消息，所述附着接受消息或所述PDN连接建立请求消息中携带所述IP地址以及所述IP地址的移动性属性。
  13. 根据权利要求12所述的方法，其特征在于，所述附着请求消息中携带所述UE的移动性偏好信息，和/或，所述PDN连接建立请求消息中携带所述UE的移动性偏好信息，以使所述MME根据移动性偏好信息确定移动性属性。
  14. 根据权利要求11所述的方法，其特征在于，所述IP地址分配装置包括第一IP地址分配装置和第二IP地址分配装置，
    所述UE接收由IP地址分配装置分配的IP地址以及所述IP地址的移动性属性包括：
    所述UE接收由第一IP地址分配装置和/或第二IP地址分配装置分配的IP地址以及所述IP地址的移动性属性；
    其中，所述IP地址的移动性属性包括提供移动性和不提供移动性，提供移动性与所述第一IP地址分配装置对应，不提供移动性与所述第二IP地址分配装置对应。
  15. 根据权利要求11或14所述的方法，其特征在于，所述IP地址分配装置集成于融合控制功能CCF中，
    在所述UE接收由IP地址分配装置分配的IP地址以及所述IP地址的移动性属性之前，所述方法还包括：
    所述UE向所述CCF发送IP地址请求消息；
    所述UE接收所述CCF返回的IP地址响应消息，所述IP地址响应消息中携带所述IP地址以及所述IP地址的移动性属性。
  16. 根据权利要求15所述的方法，其特征在于，所述IP地址请求消息为附着请求消息或者PDN连接建立请求消息，所述IP地址响应消息为附着响应消息或者PDN连接建立响应消息。
  17. 根据权利要求15所述的方法，其特征在于，所述IP地址请求消息为DHCP请求消息或者路由器请求，所述IP地址响应消息为DHCP应答消息或路由器通告消息。
  18. 根据权利要求17所述的方法，其特征在于，在所述UE接收所述CCF返回的DHCP应答消息或者路由器通告消息之后，所述方法还包括：
    所述UE接收会话管理请求消息，所述会话管理请求消息携带业务流模板TFT信息，
    所述UE传输与所述TFT信息匹配的IP报文。
  19. 根据权利要求15所述的方法，其特征在于，所述IP地址请求请求消息中携带所述UE的移动性偏好信息，以使所述CCF根据UE的移动性偏好信息确定UE的IP地址移动性属性。
  20. 一种用于IP地址分配的网络系统，其特征在于，包括IP地址分配装置和用户设备UE，其中：
    所述IP地址分配装置，用于向所述UE发送IP地址以及所述IP地址的移动性属性；
    所述UE，用于选择与自身移动性需求对应的IP地址发起业务。
  21. 根据权利要求20所述的网络系统，其特征在于，所述网络系统还包括MME，
    在所述IP地址分配装置向所述UE发送IP地址以及所述IP地址的移动性属性之前，所述UE还用于，向移动性管理实体MME发送附着请求消息或者分组数据网络PDN连接建立请求消息；
    所述MME，用于基于所述附着请求消息或者PDN连接建立请求消息，确定所述UE的IP地址移动性属性，选择与IP地址移动性属性相应的IP地址分配装置，向所述IP地址分配装置发送创建会话请求消息；
    所述IP地址分配装置具体用于：
    所述IP地址分配装置在接收到来自所述MME的创建会话请求消息后，向所述MME发送创建会话应答消息，所述创建会话应答消息中携带所述IP地址以及所述IP地址的移动性属性；
    所述MME还用于：通过基站向所述UE返回附着接受消息或者PDN连接建立请求消息，所述附着接受消息或者或者PDN连接建立请求中携带所述IP地址以及所述IP地址的移动性属性。
  22. 根据权利要求21所述的网络系统，其特征在于，所述附着请求消息中携带所述UE的移动性偏好信息，和/或，所述PDN连接建立请求消息中携带所 述UE的移动性偏好信息，
    所述MME还用于：根据移动性偏好信息确定移动性属性。
  23. 根据权利要求20-22任一所述的网络系统，其特征在于，所述IP地址分配装置为分组数据网关PGW，其对应的IP地址移动性属性为提供移动性，或者所述IP地址分配装置为本地分组数据网关LPGW，其对应的IP地址移动性属性为不提供移动性；
  24. 根据权利要求20所述的网络系统，其特征在于，所述IP地址分配装置集成于融合控制功能CCF中，
    在所述IP地址分配装置向所述UE发送IP地址以及所述IP地址的移动性属性之前，所述UE还用于：向所述CCF发送IP地址请求消息；所述CCF用于：确定所述UE的IP地址移动性属性，根据所述UE的IP地址移动性属性，选择对应的转发装置；
    所述CCF还用于：向选择的所述转发装置下发转发规则，以便所述转发装置根据所述转发规则处理所述UE发送的对应移动性属性的IP报文；
    所述IP地址分配装置具体用于：
    所述CCF向所述UE返回IP地址响应消息，所述IP地址响应消息携带所述IP地址以及所述IP地址的移动性属性。
  25. 根据权利要求24所述的网络系统，其特征在于，所述IP地址请求消息为附着请求消息或者PDN连接建立请求消息，所述IP地址响应消息为附着响应消息或者PDN连接建立响应消息。
  26. 根据权利要求24所述的网络系统，其特征在于，所述IP地址请求消息为DHCP请求消息或者路由器请求，所述IP地址响应消息为DHCP应答消息或路由器通告消息。
  27. 根据权利要求26所述的网络系统，其特征在于，还包括基站，
    在所述CCF向所述UE返回DHCP应答消息或者路由器通告消息之后，所述CCF还用于：向基站发送承载建立请求消息，并通过所述基站向所述UE发送会话管理请求消息，所述会话管理请求消息携带业务流模板TFT信息，
    所述基站向所述CCF发送承载建立应答消息；
    所述UE向所述转发装置传输与所述TFT信息匹配的IP报文。
  28. 根据权利要求24所述的网络系统，其特征在于，所述IP地址请求请求消息中携带所述UE的移动性偏好信息，
    所述CCF还用于：根据所述UE的移动性偏好信息确定UE的IP地址移动性属性。
  29. 根据权利要求24或28所述的网络系统，其特征在于，所述IP地址移动性属性包括提供移动性和不提供移动性，所述转发装置包括与提供移动性相对应的第一转发装置以及与不提供移动性相对应的第二转发装置。
  30. 一种用户设备UE，其特征在于，所述UE包括接收模块和处理模块，其中：
    所述接收模块，用于接收由IP地址分配装置分配的IP地址以及所述IP地址的移动性属性；
    所述处理模块，用于选择与自身移动性需求对应的IP地址发起业务。
  31. 根据权利要求30所述的UE，其特征在于，所述UE还包括发送模块，
    在所述接收模块接收由IP地址分配装置分配的IP地址以及所述IP地址的移动性属性之前，所述发送模块，用于向移动性管理实体MME发送附着请求消息或者分组数据网络PDN连接建立请求消息；
    所述接收模块还用于：接收所述MME通过基站返回的附着接受消息或PDN连接建立请求消息，所述附着接受消息或所述PDN连接建立请求消息中携带所述IP地址以及所述IP地址的移动性属性。
  32. 根据权利要求31所述的UE，其特征在于，所述附着请求消息中携带所述UE的移动性偏好信息，和/或，所述PDN连接建立请求消息中携带所述UE的移动性偏好信息，以使所述MME根据移动性偏好信息确定移动性属性。
  33. 根据权利要求30所述的UE，其特征在于，所述IP地址分配装置包括第一IP地址分配装置和第二IP地址分配装置，
    所述接收模块具体用于：
    接收由第一IP地址分配装置和/或第二IP地址分配装置分配的IP地址以及所述IP地址的移动性属性；
    其中，所述IP地址的移动性属性包括提供移动性和不提供移动性，其中，提供移动性与所述第一IP地址分配装置对应，不提供移动性与所述第二IP地址分配装置对应。
  34. 根据权利要求30或33所述的UE，其特征在于，所述IP地址分配装置集成于融合控制功能CCF中，
    在所述接收模块接收由IP地址分配装置分配的IP地址以及所述IP地址的移动性属性之前，所述发送模块还用于：向所述CCF发送IP地址请求消息；
    所述接收模块，用于接收所述CCF返回的IP地址响应消息，所述IP地址响应消息中携带所述IP地址以及所述P地址的移动性属性。
  35. 根据权利要求34所述的UE，其特征在于，所述IP地址请求消息为附着请求消息或者PDN连接建立请求消息，所述IP地址响应消息为附着响应消息或者PDN连接建立响应消息。
  36. 根据权利要求34所述的UE，其特征在于，所述IP地址请求消息为DHCP请求消息或者路由器请求，所述IP地址响应消息为DHCP应答消息或路由器通告消息。
  37. 根据权利要求36所述的UE，其特征在于，在所述接收模块接收所述CCF返回的DHCP应答消息或者路由器通告消息之后，所述接收模块还用于：接收会话管理请求消息，所述会话管理请求消息携带业务流模板TFT信息，
    所述发送模块还用于：传输与所述TFT信息匹配的IP报文。
  38. 根据权利要求34所述的UE，其特征在于，所述IP地址请求请求消息中携带所述UE的移动性偏好信息，以使所述CCF根据UE的移动性偏好信息确定UE的IP地址移动性属性。
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