WO2011157141A2

WO2011157141A2 - Internet protocol version 6 address allocation method and apparatus

Info

Publication number: WO2011157141A2
Application number: PCT/CN2011/075040
Authority: WO
Inventors: 周伟; 周汉
Original assignee: 华为技术有限公司
Priority date: 2011-05-31
Filing date: 2011-05-31
Publication date: 2011-12-22
Also published as: CN102918817B; CN102918817A; WO2011157141A3

Abstract

The present invention discloses an Internet Protocol version 6 (IPv6) address allocation method and apparatus, relates to the technical field of communications, and can allocate the same IPv6 prefix for the different User Equipments (UEs) in the same network domain, to increase the available space of IPv6 addresses. The embodiment of the present invention includes: transmitting an address allocation request message to an address allocation processing device by a UE, wherein the request message includes an identifier of the network domain where the UE is located, then receiving an IPv6 prefix transmitted from the address allocation processing device, and generating a global IPv6 address according to the IPv6 prefix. The solutions provided by the embodiments of the present invention are suitable for address allocation.

Description

Method and device for IPv6 address allocation

The present invention relates to the field of communications technologies, and in particular, to a method and device for IPv6 address allocation. Background technique

With the advent of the mobile broadband era, users need to use broadband access services anytime and anywhere, so EPS (Evo lved Packet System) has emerged. The core part of the EPS is EPC (Evolved Packet Core, Evolved packet core). The EPC now adopts an all-IP (Internet Protocol) (Internet Protocol) flat architecture. Therefore, when the UE (User Equipment) needs to establish a PDN (Packet Data Network) connection, it is necessary to obtain an available first. IP address, and use the IP address to communicate with the external network. Therefore, address assignment is a necessary step for the UE to create a PDN connection. With the advancement of IPv4 (Internet Protocol Protocol 4) to IPv6, the IPv6 address has been distributed in 3GPP (The 3rd Generation Partnership Project). The system is becoming more and more important.

When the address allocation is performed on the IPv6 in the 3GPP network in the prior art, the PDN-GW (Packet Data Network Gateway) allocates an IPv6 prefix to the UE according to the address type requirement sent by the UE, and the IPv6 prefix. The prefix may be managed by the PDN-GW or may be obtained by the PDN-GW. The UE generates a global IPv6 address with the interface identifier generated by the UE according to the allocated IPv6 prefix, and is used for the following. data transmission.

However, in the prior art, when IPv6 address allocation is performed, the IPv6 prefix resource is limited, resulting in a tight IPv6 address allocation, which does not satisfy the technical problem of actual use. Summary of the invention

The embodiments of the present invention provide a method and a device for allocating IPv6 addresses, which can allocate the same IPv6 prefix to different UEs in the same network domain, and increase the available space of the IPv6 address.

In order to achieve the above object, the embodiment of the present invention adopts the following technical solutions: A method for IPv6 address allocation, including:

Receiving an address allocation request message sent by the user equipment UE, where the address allocation request message includes an identifier of a network domain where the UE is located;

Determining whether the IPv6 prefix corresponding to the identifier of the network domain where the UE is located is saved; when the IPv6 prefix corresponding to the identifier of the network domain where the UE is located is saved, sending the UE to the UE The IPv6 prefix corresponding to the identifier of the network domain;

When the IPv6 prefix corresponding to the identifier of the network domain where the UE is located is not saved, the IPv6 prefix is allocated to the UE, and the identifier of the network domain where the UE is located and the relationship corresponding to the IPv6 prefix are saved.

A method for allocating an IPv6 address, comprising:

Sending an address allocation request message to the device that is configured to process the address, where the address allocation request message includes an identifier of the network domain where the user equipment UE is located, and the identifier of the network domain where the UE is located is used to obtain an IPv6 prefix;

Receiving, by the device that processes the address allocation, an IPv6 prefix obtained according to an identifier of a network domain where the UE is located, and generating a global IPv6 address according to the IPv6 prefix.

A device for IPv6 address allocation, including:

a receiving unit, configured to receive a request message for an address that is sent by the user equipment, where the request message includes an identifier of a network domain where the UE is located;

a determining unit, configured to determine whether an IPv6 prefix corresponding to an identifier of a network domain where the UE is located is saved;

a first sending unit, configured to: when storing an IPv6 prefix corresponding to an identifier of a network domain where the UE is located, send an IPv6 prefix corresponding to an identifier of a network domain where the UE is located to the UE;

An execution unit, configured to allocate an IPv6 prefix to the UE, send the IPv6 prefix to the UE, and save the UE, when an IPv6 prefix corresponding to an identifier of a network domain where the UE is located is not saved. The relationship between the identifier of the network domain in which it resides and the IPv6 prefix.

A device for allocating an IPv6 address, including: a sending unit, configured to send an address allocation request message to the device that processes the address allocation, where the request message includes an identifier of a network domain where the user equipment UE is located, and an identifier of the network domain where the UE is located is used to obtain an IPv6 prefix ;

And an execution unit, configured to receive, by the device that processes the address allocation, the IPv6 prefix obtained according to an identifier of a network domain where the UE is located, and generate a global IPv6 address according to the IPv6 prefix.

A method and a device for allocating an IPv6 address according to an embodiment of the present invention allocate an IPv6 prefix corresponding to an identifier of a network domain in which the UE is located according to an identifier of a network domain in which the UE is located. The IPv6 prefix may be an IPv6 prefix corresponding to the identifier of the network domain where the UE is located, or may be an IPv6 prefix directly allocated by the device that processes the address allocation, and save the UE. The relationship between the identifier of the network domain in which it resides and the IPv6 prefix. Compared with the prior art, the IPv6 prefix resource is limited, and the IPv6 address allocation is tight, and the technical problem of the actual use is not satisfied. The solution provided by the embodiment of the present invention may allocate the same IPv6 prefix to different UEs in the same network domain, and add IPv6. The free space of the address. DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any inventive labor.

1 is a flowchart of a method for IPv6 address allocation according to Embodiment 1 of the present invention; FIG. 2 is a flowchart of another IPv6 address allocation method according to Embodiment 1 of the present invention; 1 is a block diagram of an apparatus for IPv6 address allocation according to FIG. 1; FIG. 4 is a block diagram of another apparatus for IPv6 address allocation according to Embodiment 1 of the present invention; FIG. 5 is an IPv6 address allocation according to Embodiment 2 of the present invention; Flowchart of the packet data gateway side of the method;

FIG. 6 is a flowchart of a UE side of a method for IPv6 address allocation according to Embodiment 2 of the present invention; FIG. 8 is a flowchart of a method for IPv6 address allocation according to Embodiment 2 of the present invention; FIG. 8 is a block diagram of an apparatus for IPv6 address allocation according to Embodiment 2 of the present invention; FIG. 10 is a block diagram of a packet data gateway side of a method for IPv6 address allocation according to Embodiment 3 of the present invention;

FIG. 11 is a flow chart of a UE side of a method for IPv6 address allocation according to Embodiment 3 of the present invention;

FIG. 12 is a flowchart of a method for IPv6 address allocation according to Embodiment 3 of the present invention; FIG. 13 is a block diagram of an apparatus for IPv6 address allocation according to Embodiment 3 of the present invention; A block diagram of another IPv6 address assigned device. detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

Example 1

An embodiment of the present invention provides a method for allocating an IPv6 address. As shown in FIG. 1 , the method includes: Step 101: Receive a request message for allocating an address for a user equipment UE, where the request message includes a network domain where the UE is located. Identifier

Step 102: Determine whether an I Ρ V 6 prefix corresponding to an identifier of a network domain where the UE is located is saved.

Step 103: When an IPv6 prefix corresponding to the identifier of the network domain where the UE is located is saved, send an IPv6 prefix corresponding to the identifier of the network domain where the UE is located to the UE.

Step 104: When the IPv6 prefix corresponding to the identifier of the network domain where the UE is located is not saved, assign an IPv6 prefix to the UE, send the IPv6 prefix to the UE, and save the location where the UE is located. The relationship between the identifier of the network domain and the IPv6 prefix.

The execution body of each step may be a device for processing address allocation, and may specifically be a grouping. The data gateway, the packet data gateway may be a PDN-GW, and may also be an S-GW in a PMIP scenario. The embodiment of the invention further provides a method for IPv6 address allocation. As shown in FIG. 2, the method includes:

Step 201: Send a request message of an address allocation to a device that is configured to process an address, where the request message includes an identifier of a network domain where the user equipment UE is located, and an identifier of the network domain where the UE is located is used to obtain an IPv6 prefix.

Step 202: Receive the IPv6 prefix that is obtained by the device that processes the address allocation according to the identifier of the network domain where the UE is located, and generate a global IPv6 address according to the IPv6 prefix.

The execution body of each step described above may be a UE.

An IPv6 address allocation method is provided by the embodiment of the present invention. The device that processes the address allocation receives the identifier of the network domain where the UE is sent by the UE, and allocates an IPv6 prefix to the UE, if the processing is performed. If the IPv6 prefix corresponding to the identifier of the network domain where the UE is located is stored, the IPv6 prefix is directly sent to the UE; if not, the identifier corresponding to the network domain where the UE is located is not saved. The IPv6 prefix is used to allocate an IPv6 prefix to the UE, and the relationship between the identifier of the network domain where the UE is located and the IPv6 prefix is saved, and the UE generates a global IPv6 address according to the received IPv6 prefix. Compared with the prior art, the IPv6 prefix resource is limited, and the IPv6 address allocation is tight, and the technical problem of the actual use is not satisfied. The solution provided by the embodiment of the present invention may allocate the same IPv6 prefix to different UEs in the same network domain, and add IPv6. The free space of the address.

In order to implement the foregoing method for IPv6 address allocation, the embodiment of the present invention provides an IPv6 address allocation device, where the device may be a packet data gateway, and the packet data gateway may be a PDN-GW, and may also be a PMIP scenario. As shown in FIG. 3, the S-GW includes: a receiving unit 301, a determining unit 302, a first sending unit 303, and an executing unit 304.

The receiving unit 301 is configured to receive a request message for allocating an address for the user equipment UE, where the request message includes an identifier of a network domain where the UE is located;

The determining unit 302 is configured to determine whether an IPv6 prefix corresponding to the identifier of the network domain where the UE is located is saved; a first sending unit 303, configured to: when an IPv6 prefix corresponding to an identifier of a network domain where the UE is located, is used, send, to the UE, an IPv6 prefix corresponding to an identifier of a network domain where the UE is located;

The performing unit 304 is configured to: when an IPv6 prefix corresponding to the identifier of the network domain where the UE is located is not saved, allocate an IPv6 prefix to the UE, send the IPv6 prefix to the UE, and save the The relationship between the identifier of the network domain in which the UE is located and the IPv6 prefix.

The embodiment of the present invention further provides a device for allocating an IPv6 address, and the device may be a UE. As shown in FIG. 4, the device includes: a sending unit 401 and an executing unit 402.

The sending unit 401 is configured to send, by the device that processes the address, a request message for the address allocation, where the request message includes an identifier of the network domain where the user equipment UE is located, and the identifier of the network domain where the UE is located is used to obtain the IPv6 Prefix

The executing unit 402 is configured to receive, by the device that processes the address allocation, the IPv6 prefix obtained according to the identifier of the network domain where the UE is located, and generate a global IPv6 address according to the IPv6 prefix.

An apparatus for allocating an IPv6 address according to an embodiment of the present invention receives, by a receiving unit, an identifier of a network domain where the UE is sent by the UE, and then the determining unit determines whether an identifier of the network domain where the UE is located is saved. Corresponding IPv6 prefix, if the IPv6 prefix corresponding to the identifier of the network domain where the UE is located is saved, the first sending unit sends the IPv6 prefix to the UE; if the network domain where the UE is located is not saved The IPv6 prefix corresponding to the identifier, the execution unit allocates an IPv6 prefix to the UE, and saves the identifier of the network domain where the UE is located and the relationship corresponding to the IPv6 prefix, and then the execution unit of the UE device receives the The IPv6 prefix generates a global IPv6 address. Compared with the prior art, the IPv6 prefix resource is limited, and the IPv6 address allocation is tight, and the technical problem of the actual use is not satisfied. The solution provided by the embodiment of the present invention may allocate the same IPv6 prefix to different UEs in the same network domain, and add IPv6. The free space of the address.

Example 2

The embodiment of the present invention provides a method for allocating an IPv6 address, where the method is performed by a device that processes an address, and may be a packet data gateway, where the packet data gateway may be PDN-GW (Packet Data Network Gateway) can also be S-GW (Serving Ga teway Service Gateway) in the PMIP (Proxy Mob i le IP, Proxy Mobile IP) scenario, as shown in Figure 5. Show that the method includes:

Step 501: Receive a request message for allocating an address for the user equipment UE, where the request message includes an identifier of a network domain where the UE is located.

Specifically, after receiving the attach request message sent by the UE, the MN sends a create session request message to the PDN-GW, where the attach request message includes an identifier of the network domain where the UE is located. The receiving, by the PDN-GW, the MME sends a create session request message through the S-GW.

The MN is a mobility management network element, and is responsible for control plane functions such as user and session management, including selection of the S-GW and the PDN-GW, tracking area list management, and movement of the UE in an idle state. Management and other functions. The S-GW is mainly responsible for functions such as data transmission, forwarding, and route switching of the UE user plane. The PDN-GW is responsible for user address allocation, policy control, and enforcement of charging rules and lawful interception related functions.

The identifier of the network domain may be used to mark a group of UEs having the same characteristics, and the same characteristics may be in the same geographical location, or access to the same application, or belong to the same management entity management, or a combination of the above characteristics. . Specifically, the identifier of the network domain includes an APN (Aces s Po int Name), a group identifier, a user group identifier, or the APN, the group identifier, and the user group. A combination of identifiers.

After the PDN-GW receives the request message for allocating an address for the UE, the PDN-GW sends a response message to the UE by using the MME, and includes any one of the steps 502 or 503:

Step 502: Send, by using the MME, an interface identifier that generates a link local address to the UE. Specifically, the PDN-GW sends an interface identifier that generates a link local address to the UE by using the solid E. The link local address is an available address on the link within the local area network where the UE is located.

Step 503: Send, by using the MN, an interface identifier and a global interface identifier for generating a link local address, where the global interface identifier is used for IPv6 corresponding to an identifier of a network domain where the UE is located. The prefix generates an IPv6 address. Specifically, the PDN-GW sends, by using the solid E, an interface identifier and a global interface identifier that generate a link local address, where the link local address is a link in a local area network where the UE is located. An available address, the link local address is used to complete communication of the local network, and the global interface identifier is used to generate an IPv6 address with an IPv6 prefix corresponding to the identifier of the network domain where the UE is located.

Step 504: Determine whether an IPv6 prefix corresponding to an identifier of a network domain where the UE is located is saved.

Specifically, the PDN-GW determines whether an IPv6 prefix corresponding to the identifier of the network domain where the UE is located is stored, if the UE1 that is the same as the network domain where the UE is located, before the UE, to the PDN- If the GW requests the global IPv6 address, the corresponding relationship between the identifier of the network domain where the UE1 is located and the IPv6 prefix in the global IPv6 address is maintained on the PDN-GW, so that the UE requests When the global IPv6 address is used, the IPv6 prefix allocated by the PDN-GW is the same as that of the UE 1, so that different UEs in the same network domain may have the same I Pv 6 prefix and increase the IPv6 address. Free space and increase the utilization of IPv6 addresses.

Step 505: When an IPv6 prefix corresponding to an identifier of a network domain where the UE is located is saved, send, to the UE, the IPv6 prefix corresponding to an identifier of a network domain that the UE is configured to be;

Specifically, the PDN-GW sends an RA message to the UE by using the MN, and the RA message includes the IPv6 prefix used by the UE to generate a global IPv6 address. The PDN-GW periodically sends the RA message to the UE through the MN E or sends the RA message to the UE through the solid E after receiving the RS request.

It should be noted that, when the IPv6 prefix corresponding to the identifier of the network domain where the UE is located is stored on the PDN-GW, if the UE2 that is the same as the network domain where the UE is located, the UE2 requests to allocate the global IPv6. An address, at which time the PDN-GW periodically sends the RA message to the UE2 through the MME, so the number of propagation of the RA message in the network may be reduced to some extent.

Step 506: When the IPv6 prefix corresponding to the identifier of the network domain where the UE is located is not saved, assign an IPv6 prefix to the UE, send the IPv6 prefix to the UE, and save the location where the UE is located. The relationship between the identifier of the network domain and the IPv6 prefix; Specifically, when the IPv6 prefix corresponding to the identifier of the network domain where the UE is located is not saved on the PDN-GW, the PDN-GW allocates an IPv6 according to the identifier of the network domain where the UE is located. a prefix, the IPv6 prefix is carried in the RA message, and the identifier is sent to the UE by using the E, and the identifier of the network domain where the UE is located and the location allocated to the UE are saved on the PDN-GW. The correspondence between the IPv6 prefixes.

The IPv6 address allocation method provided by the embodiment of the present invention, when the UE having the same network domain as the UE is requested to request the global IPv6 address again, the PDN-GW allocates the IPv6 with the UE to the UE. The schemes provided by the embodiments of the present invention may be the same as the technical solutions to the problem of the IPv6 address allocation in the prior art when the IPv6 address allocation is limited, and the IPv6 address allocation is limited. Different UEs in the network domain allocate the same IPv6 prefix, increase the available space of the IPv6 address, and satisfy the technical problem of actual use.

The embodiment of the present invention further provides a method for allocating an IPv6 address, where the execution subject of the method is a UE, as shown in FIG. 6, the method includes:

Step 601: Send an address allocation request message to the device that is configured to process the address, where the address allocation request message includes an identifier of a network domain where the user equipment UE is located, and an identifier of the network domain where the UE is located is used to obtain an IPv6 prefix.

The device for processing the address allocation is a packet data gateway, and the packet data gateway is specifically a PDN-GW, and may also be an S-GW in a PMIP scenario. The following describes the packet data gateway as a PDN-GW as an example.

The UE sends an address allocation request message to the PDN-GW through the mobility management network element ,E. Specifically, the UE sends an attach request message to the MME, and then the MME sends the packet to the packet data gateway. a session request message, where the attach request message includes an identifier of a network domain where the user equipment UE is located, and the create session request message includes an identifier of a network domain where the UE is located. The create session request message sent by the solid E to the packet data gateway is sent by the S-GW to the PDN-GW.

The identifier of the network domain may be used to mark a group of UEs having the same characteristics, which may be in the same geographical location, or access the same application, or belong to the same management.

Correction page (Article 91) Entity management, or a combination of the above features. The identifier of the network domain includes an access point name APN, a group identifier, a user group identifier, or a combination of the APN, the group identifier, and the user group identifier.

After the address allocation request message sent by the MME to the device that is configured to process the address, the PDN-GW sends a response message to the UE by using the MME, including any one of step 602 or step 603. Program:

Step 602: Receive an interface identifier of the local address of the link that is sent by the PDN-GW by using the solid E, where the link local address is used to complete communication of the local network.

Specifically, after receiving the attach response message sent by the PDN-GW, the MN sends a create session response message to the UE, where the UE receives the create session response message sent by the MME, and the attaching The response message includes an interface identifier for generating a link local address, the create session response message includes an interface identifier for generating a link local address, and the MME receives the attach response message sent by the PDN-GW through the S -GW received.

Step 603: Receive an interface identifier and a global interface identifier of a link local address generated by the PDN-GW by using the solid E, where the global interface identifier is used for an identifier of a network domain where the UE is located. The corresponding IPv6 prefix generates an IPv6 address.

Specifically, after receiving the attach response message sent by the PDN-GW, the MN sends a create session response message to the UE, where the UE receives the create session response message sent by the MME, and the attaching The response message includes an interface identifier for generating a link local address and a global interface identifier, and the creating the session response message includes an interface identifier for generating a link local address and a global interface identifier, and the MME receives the PDN- The attach response message sent by the GW is received by the S-GW.

Step 604: Generate a link local address according to the interface identifier of the link local address.

The UE generates a link local address according to the interface identifier of the link local address, where the link local address is an available address on a link in the local area network where the UE is located, and can be used to complete the local network. The communication, for example, sends a route request RS message and receives a route advertisement RA message. The router may be the PDN-GW. If the UE does not receive the RA message sent by the PDN-GW within a certain time, the UE may actively send the RS to the PDN-GW. A message to obtain the RA message.

Step 605: Receive, by using the solid E, the IPv6 prefix that is sent by the PDN-GW according to an identifier of a network domain where the UE is located, and generate a global IPv6 address according to the IPv6 prefix. Specifically, the Receiving, by the UE, the RA message sent by the PDN-GW, where the RA message includes an IPv6 prefix used by the UE to generate a global address. A global IPv6 address is then generated based on the IPv6 prefix and a unique interface identifier identifying the UE. The unique interface identifier that identifies the UE is an interface identifier generated according to a MAC (Media Access Control Layer) address; or the unique interface identifier that identifies the UE is a received global identifier. Interface identifier. Here, before the acknowledgment of the generated global IPv6 address, the UE needs to perform an address repetition check to ensure that the generated global IPv6 address is unique within the network domain where the UE is located. The global IPv6 address refers to a unique address that can be used in the global public domain.

Step 606, the UE will generate the global IPv6 address to the PDN-GW ₀ E by the Li

Specifically, the UE sends the generated global IPv6 address to the MN, and then the MME sends the global IPv6 address to the PDN-GW through the S-GW to perform communication.

The IPv6 address allocation method is provided by the embodiment of the present invention. The UE receives the IPv6 prefix sent by the PDN-GW, and the PDN-GW may allocate the same IPv6 prefix to different UEs in the same network domain, and then the UE is configured according to the UE. The IPv6 prefix generates a global IPv6 address with a unique interface identifier that identifies the UE. Compared with the prior art, when the IPv6 address allocation is performed, the IPv6 prefix resource is limited, and the IPv6 address allocation is tight, which is not satisfied with the technical problem of the actual use. The solution provided by the embodiment of the present invention may be allocated to different UEs in the same network domain. The same IPv6 prefix increases the available space of the IPv6 address and increases the utilization of the IPv6 address.

An embodiment of the present invention provides a method for IPv6 address allocation. As shown in FIG. 7, the method includes: Step 701: A user equipment UE sends an identifier of a network domain to which a device is allocated by using a mobility management network element E to a device that processes an address. The identifier of the network domain where the UE is located is used to obtain an IPv6 prefix; The device that processes the address allocation is a packet data gateway, where the packet data gateway is specifically

The PDN-GW can also be an S-GW in the PMIP scenario. The following describes the packet data gateway as a PDN-GW as an example. Specifically, the UE sends an attach request message to the MME, and then the MME sends a create session request message to the packet data gateway, where the attach request message includes a network domain where the user equipment UE is located. The identifier, the create session request message includes an identifier of a network domain in which the UE is located. The create session request message sent by the MN to the packet data gateway is sent to the PDN-GW through the serving gateway S-GW.

Step 702: The PDN-GW receives, by using the MN, an identifier of a network domain where the UE is sent by the UE, where

Specifically, after receiving the attach request message sent by the UE, the MN sends a create session request message to the PDN-GW, where the attach request message includes an identifier of a network domain where the UE is located. And receiving, by the PDN-GW, the MME sends a create session request message by using the S-GW.

After the PDN-GW receives the identifier of the network domain where the UE is sent by the UE, the PDN-GW includes any one of the steps 703 or 704:

Step 703: The PDN-GW sends, by using the MN, an interface identifier that generates a link local address to the UE, where the link local address is used to complete communication of the local network.

The PDN-GW sends an attach response message to the MME through the S-GW, and then the MME sends a Create Session Response message to the UE, where the attach response message includes generating a link local address. The interface identifier includes: an interface identifier that generates a link local address, where the link local address specifically refers to an available address on a link in the local area network where the UE is located, The link local address is used to complete communication on the local network. Step 704: The PDN-GW sends, by using the MN E, an interface identifier and a global interface identifier for generating a link local address to the UE, where the global interface identifier is used for the network domain where the UE is located. The IPv6 prefix corresponding to the identifier generates an IPv6 address.

Specifically, the PDN-GW sends an attach response message to the MME through the S-GW, and then the MME sends a create session response message to the UE, where the attach response message includes generating a link. An interface identifier of the local address and a global interface identifier, the create session response message including an interface identifier and a global interface identifier for generating a link local address. The global interface identifier is an identifier for generating a global IPv6 address by the UE, and the link local address specifically refers to an available address on a link in a local area network where the UE is located.

Step 705: The UE generates a link local address according to the interface identifier of the received link local address.

The UE generates a link local address according to the received interface identifier of the link local address, where the link local address is an available address on a link in the local area network where the UE is located, and may be used The communication of the local network is completed, for example, sending a route request RS message and receiving a route advertisement RA message. The router may be the PDN-GW. If the UE does not receive the RA message sent by the PDN-GW within a certain period of time, the UE may actively send the RS message to the PDN-GW to obtain the RA message.

Step 706: The PDN-GW determines whether an IPv6 prefix corresponding to the identifier of the network domain where the UE is located is saved.

Step 707: When an IPv6 prefix corresponding to the identifier of the network domain where the UE is located is saved, The IPv6 prefix should be;

Specifically, the PDN-GW sends an RA message to the UE by using the MN, the RA message includes an IPv6 prefix corresponding to an identifier of a network domain where the UE is located, and the IPv6 prefix is used by the The UE generates a global IPv6 address. The PDN-GW periodically sends the RA message to the UE through the MME or sends the RA message to the UE through the MME after receiving the RS request.

Step 708: When the IPv6 prefix corresponding to the identifier of the network domain where the UE is located is not saved, the PDN-GW allocates an IPv6 prefix to the UE, and sends the IPv6 prefix to the UE, and saves And the relationship between the identifier of the network domain where the UE is located and the IPv6 prefix; specifically, when the IPv6 prefix corresponding to the identifier of the network domain where the UE is located is not saved on the PDN-GW, The PDN-GW allocates an IPv6 prefix according to the identifier of the network domain in which the UE is located, and the IPv6 prefix is carried in the RA message and sent to the UE by the MME, and is saved on the PDN-GW. a correspondence between an identifier of a network domain in which the UE is located and the IPv6 prefix allocated to the UE.

A method for allocating an IPv6 address according to an embodiment of the present invention, when a UE having the same network domain as the UE is requested to request a global IPv6 address again, the PDN-GW allocates an IPv6 with the UE to the UE. The schemes provided by the embodiments of the present invention may be the same as the technical solutions to the problem of the IPv6 address allocation in the prior art when the IPv6 address allocation is limited, and the IPv6 address allocation is limited. Different UEs in the network domain allocate the same IPv6 prefix, increase the available space of the IPv6 address, and satisfy the technical problem of actual use.

Step 709: The UE receives the sixth generation Internet Protocol IPv6 prefix sent by the PDN-GW by using the solid E, and generates a global IPv6 address according to the IPv6 prefix. Receiving, by the UE, the RA message sent by the PDN-GW, where the RA message includes an IPv6 prefix used by the UE to generate a global address, and then, according to the IPv6 prefix, a unique interface that identifies the UE. The identifier generates a global IPv6 address. The unique interface identifier that identifies the UE is an interface identifier generated according to a MAC (Media Acces s Control) address; or the unique interface identifier that identifies the UE is received The global interface identifier. Here, before the acknowledgment of the generated global IPv6 address, the UE needs to perform an address repetition check to ensure that the generated global IPv6 address is unique within the network domain where the UE is located. The global IPv6 address refers to a unique address that can be used in the global public domain.

Step 710, the UE will generate the global IPv6 address to the PDN-GW ₀ E by the Li

It should be noted that, in the prior art, the PDN-GW directly allocates an IPv6 prefix to the UE according to the identifier of the network domain where the UE is located, and then combines with the interface identifier generated by the UE itself. Become a global IPv6 address. The IPv6 prefix is carried in the RA message by the PDN-GW to be sent to the UE by using the solid E. The IPv6 prefix may be managed by the PDN-GW or may be externally obtained by the PDN-GW. The IPv6 prefix included in the RA message is unique. Since the IPv6 prefix assigned to the UE is unique each time, and the resources of the IPv6 prefix are limited, the IPv6 address allocation is tight.

A method for allocating an IPv6 address according to an embodiment of the present invention, by using an identifier of a network domain where the UE is located and the IPv6 prefix corresponding to the PDN-GW in the device group allocated by the processing address A relationship may be assigned to different UEs in the same network domain with the same IPv6 prefix, and then a global IPv6 address is generated according to the IPv6 prefix. Compared with the prior art, when the IPv6 address allocation is performed, the IPv6 prefix resource is limited, and the IPv6 address allocation is tight, which is not satisfied with the technical problem of the actual use. The solution provided by the embodiment of the present invention may be allocated to different UEs in the same network domain. The same IPv6 prefix increases the available space of the IPv6 address and improves the utilization of the IPv6 address, and can reduce the number of RA messages spread in the network to some extent. An embodiment of the present invention provides an IPv6 address allocation device, where the device may be a UE. As shown in FIG. 8, the device includes: a sending unit 401, an executing unit 402, a first receiving unit 403, and a second receiving unit 404, and receiving Module 405, generating module 406.

The device for processing the address allocation is a packet data gateway, and the packet data gateway is specifically a PDN-GW, and may also be an S-GW in a PMIP scenario. The sending unit 401 is specifically configured to: send an attach request message to the mobile management network element E, and then send the create session request message to the packet data gateway, where the attach request message includes the user equipment UE An identifier of the network domain in which the session request message includes an identifier of the network domain in which the UE is located, and the session creation request message sent by the MME to the packet data gateway is through the serving gateway S-GW. Sent to the PDN-GW.

a first receiving unit 403, configured to receive an interface identifier of the link local address generated by the PDN-GW sent by the MN, where the link local address is used to complete communication of the local network; or, the second receiving The unit 404 is configured to receive an interface identifier and a global interface identifier of the link local address generated by the PDN-GW by using the MME, where the global interface identifier is used to identify with a network domain where the UE is located. The IPv6 prefix corresponding to the character generates an IPv6 address;

Specifically, the session response message is sent by the solid E, and the session response message specifically refers to an available address on the link in the local area network where the UE is located, including an interface for generating a link local address. The identifier or the interface identifier and the global interface identifier that generate the link local address, and are sent by the MME after receiving the attach response message sent by the PDN-GW, where the attach response message includes generating a link. The interface identifier of the local address or the interface identifier and the global interface identifier that generate the link local address, specifically, after the MME receives the attach response message sent by the PDN-GW through the S-GW Sending a session creation response message to the UE.

The UE then generates a link local address according to the interface identifier of the link local address, and the link local address can be used to complete communication of the local network. If the UE is within a certain time If the RA message sent by the PDN-GW is not received, the UE may actively send the RS message to the PDN-GW to obtain the RA message.

The executing unit 402 is configured to receive a sixth-generation Internet Protocol I Pv6 prefix sent by the PDN-GW, and generate a global IPv6 address according to the IPv6 prefix.

The global IPv6 address refers to a unique address that can be used in the global public domain.

Specifically, the receiving module 405 in the executing unit 402 receives an RA message sent by the PDN-GW through the MN, the RA message includes an IPv6 prefix used by the UE to generate a global address; and then the performing The generating module 406 in the unit 402 generates a global IPv6 address according to the IPv6 prefix and a unique interface identifier that identifies the UE, where the unique interface identifier that identifies the UE is an interface identifier generated according to the MAC address. Or; the unique interface identifier that identifies the UE is the received global interface identifier.

The interface identifier generated by the UE itself is an interface identifier generated according to a MAC (Media Acces s Control) address.

Here, the IPv6 prefix may be an IPv6 prefix that is stored on the PDN-GW and that corresponds to an identifier of a network domain where the UE is located, or may be an IPv6 prefix allocated by the PDN-GW to the UE. And storing the identifier of the network domain where the UE is located and the relationship corresponding to the IPv6 prefix, so that when the UE with the same network domain as the UE requests the global IPV 6 address, the PDN-GW will It is assigned the same IPv6 prefix as the IPv6 prefix of the UE. In the prior art, when the IPv6 address allocation is performed, the IPv6 prefix resource is limited, and the IPv6 address allocation is tight, which is not sufficient for the technical problem of the actual use. The solution provided by the embodiment of the present invention can enable different UEs in the same network domain to have different UEs in the same network domain. The same IPv6 prefix increases the available space of the IPv6 address and improves the utilization of the IPv6 address.

Here, before the acknowledgment of the generated global IPv6 address, the UE needs to perform an address re-check to ensure that the generated global IPv6 address is unique within the network domain where the UE is located.

The embodiment of the present invention further provides an apparatus for allocating an IPv6 address, where the device may be a packet data gateway, where the packet data gateway may be a PDN-GW, or may be an S-GW in a PMIP scenario. As shown in FIG. 9, the device includes: a receiving unit 301, a determining unit 302, a first sending unit 303, an executing unit 304, a second sending unit 305, and a third sending unit 306.

The receiving unit 301 is specifically configured to: receive a LSP to send a session request message, where the session request message includes an identifier of a network domain where the UE is located, and the create session request message is received by the MN And sending, by the UE, an attach request message, where the attach request message includes an identifier of a network domain where the UE is located.

After the receiving unit 301 receives the identifier of the network domain where the UE is sent by the UE, the second sending unit 305 sends an interface identifier for generating a link local address to the UE by using the MME, The link local address is used to complete communication of the local network, specifically, sending an attach response message to the MME, and then sending the session response message to the UE, where the attach response message includes Generating an interface identifier of the link local address, where the create session response message includes an interface identifier for generating a link local address; the link local address specifically refers to an available link on the link in the local area network where the UE is located the address of.

Or, after the receiving unit 301 receives the identifier of the network domain where the UE is sent by the UE, the third sending unit 306 sends, by using the MME, an interface identifier that generates a link local address to the UE. And a global interface identifier, the global interface identifier is used to generate an IPv6 address with an IPv6 prefix corresponding to the identifier of the network domain where the UE is located;

Specifically, the method is configured to send an attach response message to the MME, and then the MME sends a create session response message to the UE, where the attach response message includes an interface identifier and a global interface identifier for generating a link local address. The creating a session response message includes an interface identifier and a global interface identifier for generating a link local address, where the link local address specifically refers to an available address on a link in the local area network where the UE is located. The global interface identifier is used by the UE to generate a global IPv6 address.

The determining unit 302 is configured to determine whether an IPv6 prefix corresponding to the identifier of the network domain where the UE is located is saved. Here, specifically, the PDN-GW determines whether the UE is located with the UE. The IPv6 prefix corresponding to the identifier of the network domain.

The first sending unit 303 is configured to: when storing an IPv6 prefix corresponding to the identifier of the network domain where the UE is located, send an IPv6 prefix corresponding to the identifier of the network domain where the UE is located to the UE;

And sending, by the MME, an RA message to the UE, where the RA message includes an IPv6 prefix used by the UE to generate a global IPv6 address. The global IPv6 address refers to a unique address that can be used in the global public domain.

After the UE generates the global IPv6 address according to the received IPv6 prefix, the UE receives the global IPv6 address sent by the UE to perform communication.

An apparatus for allocating an IPv6 address according to the embodiment of the present invention, the determining, by the determining unit, whether the IPv6 prefix corresponding to the identifier of the network domain where the UE is located is saved, the first sending unit and the network domain where the UE is located The IPv6 prefix corresponding to the identifier is sent to the UE or the execution unit sends an IPv6 prefix allocated to the UE to the UE, and saves the identifier of the network domain where the UE is located and the relationship corresponding to the IPv6 prefix. In order to allocate the same IPv6 prefix when requesting the global IPv6 address from the same UE as the network domain in which the UE is located. In the prior art, when the IPv6 address allocation is performed, the IPv6 prefix resource is limited, and the IPv6 address allocation is tight, which is not sufficient for the technical problem of the actual use. The solution provided by the embodiment of the present invention may be allocated to different UEs in the same network domain. The same IPv6 prefix increases the available space of the IPv6 address and increases the utilization of the IPv6 address.

Example 3

An embodiment of the present invention provides a method for allocating an IPv6 address, where the method is performed by an apparatus for processing an address, and may be a packet data gateway, where the packet data gateway may be a PDN-GW, and in a PMIP scenario. It can be an S-GW, as shown in FIG. 10, the method includes:

Step 1001: The device that processes the address allocation negotiates with the dynamic host configuration protocol DHCPv6 server. Whether to support the ability of the DHCPv6 server to allocate a global IPv6 address;

The device for processing the address allocation is a packet data gateway, and the packet data gateway is specifically a PDN-GW, and may also be an S-GW in a PMIP scenario.

Specifically, if the DHCPv6 server supports the capability of the DHCPv6 server to allocate a global IPv6 address, perform the following process. If the DHCPv6 server does not support the capability of the DHCPv6 server to allocate a global IPv6 address, perform according to the prior art. .

Step 1002: Receive a request message for allocating an address for the user equipment UE, where the request message includes an identifier of a network domain where the UE is located;

It should be noted that the step 1 001 may be pre-negotiated and configured on the PDN-GW before the method of the IPv6 address allocation is performed, or may be the UE in the step 1 002 to the PDN- When the GW sends a packet containing the identifier of the network domain where the UE is located, it is carried in the packet and then sent to the PDN-GW to trigger.

Step 1003: Send, by using the MME, an interface identifier that generates a link local address to the UE, and whether the DHCPv6 server has an identifier that supports the capability of allocating the global IPv6 address. Specifically, the PDN-GW passes the Transmitting the interface identifier of the link local address to the UE and whether the DHCPv6 server has an identifier supporting the capability of allocating the global IPv6 address, and whether the DHCPv6 server has the capability of supporting the allocation of the global IPv6 address. The identifier may be represented by DHCP-FLAG, and if the DHCPv6 server has the capability to support allocation of the global IPv6 address, the PDN-GW sends the DHCP-FLAG identifier to the UE, If the DHCPv6 server does not have the capability to support the allocation of the global IPv6 address, the PDN-GW does not send the DHCP-FLAG identifier to the UE, to inform the UE whether the DHCPv6 can be sent to the DHCPv6. The server requests the global IPv6 address.

Step 1004: Determine whether an IPv6 prefix corresponding to an identifier of a network domain where the UE is located is saved.

After receiving the DHCP Reques t message, the PDN-GW checks the identifier of the network domain to which the DHCP Reques t message belongs, that is, the identifier of the network domain where the UE is located, and then determines whether the information is saved. The IPv6 prefix corresponding to the identifier of the network domain where the UE is located.

Step 1005: When the IPv6 prefix corresponding to the identifier of the network domain where the UE is located is saved, the PDN-GW sends the IPv6 prefix to the dynamic host configuration protocol DHCPv6 server, and the DHCPv6 server Transmitting, by the UE, a global IPv6 address carrying the IPv6 prefix; specifically, when storing an IPv6 prefix corresponding to an identifier of a network domain where the UE is located, the PDN-GW uses the IPv6 prefix and the DHCP Reques The t message is forwarded to the DHCPv6 server, and after receiving the DHCP Rep ly message sent by the DHCPv6 server, the message is forwarded to the UE. The DHCP Reply message includes a global IPv6 address carrying the IPv6 prefix.

Step 1006: When the IPv6 prefix corresponding to the identifier of the network domain where the UE is located is not saved, the PDN-GW parses the DHCP Reply message sent by the DHCPv6 server to obtain an IPv6 prefix, and carries the IPv6 prefix. The global IPv6 address is sent to the UE, and the identifier of the network domain where the UE is located and the relationship corresponding to the IPv6 prefix are saved;

Specifically, when the IPv6 prefix corresponding to the identifier of the network domain where the UE is located is not saved, after the PDN-GW receives the DHCP Reply message sent by the DHCPv6 server, the DHCP Reply message includes a carrier. Describe the global IPv6 address of the IPv6 prefix, the PDN-GW parses the global IPv6 address in the DHCP Reply message, and obtains the IPv6 prefix corresponding to the identifier of the network domain where the UE is located, and in the The PDN-GW saves the identifier of the network domain where the UE is located and the relationship corresponding to the IPv6 prefix, and then the PDN-GW forwards the global IPv6 address carrying the IPv6 prefix to the UE.

A method for allocating an IPv6 address provided by an embodiment of the present invention, through a DHCPv6 server Transmitting, by the UE, a global IPv6 address that carries the IPv6 prefix, and storing, on the P-GW, a relationship between an identifier of the network domain where the UE is located and the IPv6 prefix, and may be requested by different UEs in the same network domain. When the global IPv6 address is used, the same IPv6 prefix is assigned. When the IPv6 address allocation is performed in the prior art, the IPv6 prefix resource is limited, and the IPv6 address allocation is tight. The solution provided by the embodiment of the present invention may be the same for different UEs in the same network domain. The IPv6 prefix increases the available space of the IPv6 address and increases the utilization of the IPv6 address.

The embodiment of the present invention further provides a method for allocating an IPv6 address, where the method is performed by the UE, as shown in FIG.

Step 1101: Send an address allocation request message to the device that is configured to process the address, where the address allocation request message includes an identifier of a network domain where the user equipment UE is located, and an identifier of the network domain where the UE is located is used to obtain an IPv6 prefix.

The UE sends an address allocation request message to the PDN-GW through the mobility management network element ,E. Specifically, the UE sends an attach request message to the MME, and then the MME sends the message to the packet data gateway. A session request message is created, where the attach request message includes an identifier of a network domain where the user equipment UE is located, and the create session request message includes an identifier of a network domain where the UE is located. The create session request message sent by the packet to the packet data gateway is sent to the PDN-GW through the serving gateway S-GW.

The identifier of the network domain may be used to mark a group of UEs having the same characteristics, which may be in the same geographical location, or access to the same application or belong to the same management entity management, or a combination of the above characteristics. The identifier of the network domain includes an access point name APN, a group identifier, a user group identifier, or a combination of the APN, the group identifier, and the user group identifier.

Step 1102: Receive, by the PDN-GW, a link local address generated by the MME.

- 22 - Correction page (Article 91) a port identifier and whether the DHCPv6 server has an identifier for assigning the global IPv6 address capability;

After receiving the attach response message sent by the PDN-GW, the MME sends a create session response message to the UE, where the create session response message includes an interface identifier for generating a link local address and the DHCPv6 Whether the server has an identifier for assigning the global IPv6 address capability, the attach response message includes an interface identifier for generating a link local address, and an identifier of whether the DHCPv6 server has the capability of allocating the global IPv6 address, The E-E receives the Echo Reply message sent by the PDN-GW, and is received by the S-GW. The link local address specifically refers to an available address on the link in the local area network where the UE is located.

Step 1103: Generate a link local address according to the interface identifier of the link local address. The UE generates a link local address according to the interface identifier of the link local address, where the link local address is where the UE is located. An available address on the link within the local area network that can be used to complete local network communication and is used to initiate DHCP Reques requests.

Step 1104: The UE receives a DHCP Reply message sent by the DHCPv6 server, where the DHCP Reply message includes a global IPv6 address carrying the IPv6 prefix.

Specifically, the UE receives, by using the MME and the PDN-GW, a DHCP Reply message sent by the DHCPv6 server, where the DHCP Reply message includes a global IPv6 address of the UE that carries the IPv6 prefix.

An IPv6 address allocation method is provided by the embodiment of the present invention. When the global IPv6 address is requested by different UEs in the same network domain, the UE is assigned the same IPv6 prefix. Compared with the prior art, when the IPv6 address allocation is performed, the IPv6 prefix resource is limited, and the IPv6 address allocation is tight, which is not satisfied with the technical problem of the actual use. The solution provided by the embodiment of the present invention may be allocated to different UEs in the same network domain. The same IPv6 prefix increases the available space of the IPv6 address and increases the utilization of the IPv6 address.

The embodiment of the invention provides a method for IPv6 address allocation. As shown in FIG. 12, the method includes:

Step 1201: Processing the address allocation device and the dynamic host configuration protocol DHCPv6 server protocol Whether the quotient supports the ability of the DHCPv6 server to allocate a global IPv6 address;

The device that processes the address allocation is a packet data gateway, where the packet data gateway is specifically

PDN-GW can also be S-GW in the PMIP scenario.

Step 1202: The user equipment UE sends the identifier of the network domain where the UE is located to the device that processes the address through the mobility management network element E, and the identifier of the network domain where the UE is located is used to obtain an IPv6 prefix.

The identifier of the network domain may be used to mark a group of UEs having the same characteristics, and the same characteristics may be UEs in the same geographical location, or access to the same application, or belong to the same management entity management, or A combination of features. The identifier of the specific network domain may include an APN (Aces s Po int Name), a group identifier, a user group identifier, or the APN, the group identifier, and the user. A combination of group identifiers.

It should be noted that the step 1201 may be pre-negotiated and configured on the PDN-GW before the method for performing the IPv6 address allocation, or may be sent by the UE to the PDN-GW in step 1202. The packet containing the identifier of the network domain where the UE is located is carried in the packet and then sent to the PDN-GW for triggering.

Step 1203: The PDN-GW receives, by using the MN E, an identifier of a network domain where the UE is sent by the UE, and sends an interface identifier that generates a link local address to the UE and the DHCPv6 server. Whether there is an identifier for assigning the global IPv6 address capability;

Whether the DHCPv6 server has an identifier capable of supporting the allocation of the global IPv6 address may be represented by a DHCP-FLAG, and if the DHCPv6 server has the capability of supporting the allocation of the global IPv6 address, the PDN-GW to the UE Sending the DHCP-FLAG identifier, if the DHCPv6 server does not have the capability to support the allocation of the global IPv6 address, the PDN-GW does not send the DHCP-FLAG identifier to the UE, to notify Whether the UE can request the global IPv6 address from the DHCPv6 server. Step 1204: The UE receives an interface identifier of a link local address generated by the PDN-GW through the MN, and an identifier of whether the DHCPv6 server has the capability of allocating the global IPv6 address.

Step 1205: The UE generates a link local address according to an interface identifier that generates a link local address.

The UE generates a link local address according to the interface identifier that generates the link local address, and the link local address can be used to complete communication of the local network, and is used to initiate a DHCP Reques request.

Step 1206: The UE sends a DHCP Reques t message to the DHCPv6 server, where the DHCP Reques t message requests the UE to allocate the global IPv6 address to the DHCPv6 server.

And the DHCP Reques t message sent by the UE to the DHCPv6 server by using the MME and the PDN-GW, where the DHCP Reques t message is sent by the UE to the DHCPv6 server in the form of a packet. .

Step 1207: The PDN-GW determines whether an IPv6 prefix corresponding to an identifier of a network domain where the UE is located is saved.

Step 1208: When the IPv6 prefix corresponding to the identifier of the network domain where the UE is located is saved, the PDN-GW sends the IPv6 prefix to the dynamic host configuration protocol DHCPv6 server, and the DHCPv6 server provides the The UE sends a global IPv6 address carrying the IPv6 prefix. Specifically, when the IPv6 prefix corresponding to the identifier of the network domain where the UE is located is stored, the PDN-GW is determined according to the identifier of the network domain where the UE is located. And querying an IPv6 prefix corresponding to the identifier of the network domain where the UE is located, and then forwarding the IPv6 prefix and the DHCP Reques t message to the DHCPv6 server, and receiving the DHCP Rep sent by the DHCPv6 server After the ly message, it is forwarded to the UE. The DHCP Rep ly message includes a global IPv6 address carrying the IPv6 prefix. Step 1209: When the IPv6 prefix corresponding to the identifier of the network domain where the UE is located is not saved, the DHCP Reply message sent by the DHCPv6 server is parsed to obtain an IPv6 prefix, and the global IPv6 address carrying the IPv6 prefix is sent to the And the UE saves a relationship between an identifier of a network domain where the UE is located and the IPv6 prefix;

Specifically, when the IPv6 prefix corresponding to the identifier of the network domain where the UE is located is not saved, after the PDN-GW receives the DHCP Reply message sent by the DHCPv6 server, the DHCP Reply message includes carrying the IPv6 a global IPv6 address of the prefix, the PDN-GW parses the global IPv6 address in the DHCP Reply message, and obtains the IPv6 prefix corresponding to the identifier of the network domain where the UE is located, and in the PDN-GW Preserving the relationship between the identifier of the network domain where the UE is located and the IPv6 prefix, and then the PDN-GW forwards the DHCP Reply message to the UE, and the global IPv6 address of the IPv6 prefix is to be carried. Sent to the UE.

Step 1210: The UE receives, by using the solid E, a global IPv6 address that is sent by the PDN-GW and includes an IPv6 prefix.

It should be noted that the PDN-GW allocates an IPv6 prefix to the UE according to the identifier of the network domain where the UE is located, and then combines with the interface identifier generated by the UE to form a global IPv6 address. The IPv6 prefix is carried in the RA message by the PDN-GW to be sent by the Pseudo E to the UE, and the IPv6 prefix may be managed by the PDN-GW or may be externally obtained by the PDN-GW. The IPv6 prefix included in the RA message is unique. Since the IPv6 prefix assigned to the UE is unique each time, and the resources of the IPv6 prefix are limited, the IPv6 address allocation is tight.

A method for allocating an IPv6 address according to an embodiment of the present invention, the DHCPv6 server sends a global IPv6 address carrying the IPv6 prefix to the UE, and saves, on the PDN-GW, an identifier and a network domain where the UE is located. The relationship corresponding to the IPv6 prefix may be assigned to the same IPv6 prefix when different UEs in the same network domain request the global IPv6 address. In the prior art When the IPv6 address allocation is performed, the IPv6 prefix resource is limited, and the IPv6 address allocation is tight, which does not satisfy the technical problem of the actual use. The solution provided by the embodiment of the present invention can allocate the same IPv6 prefix to different UEs in the same network domain, and increase Free space for IPv6 addresses and increased utilization of IPv6 addresses.

The embodiment of the present invention provides a device for allocating an IPv6 address, and the device may be a UE. As shown in FIG. 13, the device includes: a sending unit 401, a third receiving unit 407, and a receiving module 408.

The sending unit 401 is configured to send, to the device that processes the address, an address allocation request message, where the address allocation request message includes an identifier of a network domain where the user equipment UE is located, and an identifier of the network domain where the UE is located is used to obtain IPv6 prefix;

The device group for processing the address allocation is a packet data gateway, and the packet data gateway is specifically a PDN-GW, and may also be an S-GW in a PMIP scenario. The sending unit 401 is specifically configured to: send an attach request message to the mobile management network element E, and then send the create session request message to the PDN-GW by using the S-GW, and the attach request message And including an identifier of a network domain where the user equipment UE is located, where the creation session request message includes an identifier of a network domain where the UE is located.

a third receiving unit 407, configured to receive, by the PDN-GW, an interface identifier for generating a link local address sent by the MN and whether the DHCPv6 server has an identifier for assigning the global IPv6 address capability;

Receiving a create session response message sent by the MME, where the create session response message sent by the MME is sent by the MME after receiving the attach response message sent by the PDN-GW, where the session response report is sent. The method includes an interface identifier for generating a link local address, and an identifier of whether the DHCPv6 server has the capability of allocating the global IPv6 address, where the attach response message includes an interface identifier for generating a link local address and the DHCPv6 server Whether there is an identifier for assigning the global IPv6 address capability; whether the DHCPv6 server has the ability to support allocation of the global IPv6 address is jointly negotiated by the PDN-GW and the DHCPv6 server.

A link local address is then generated according to the interface identifier that generates the link local address, and the link local address can be used to complete communication of the local network. The link local address specifically refers to an available address on a link in a local area network where the UE is located. The receiving module 408 is configured to receive a DHCP Reply message sent by the DHCPv6 server, where the DHCP Reply message includes a global IPv6 address of the UE that carries the IPv6 prefix, where the global IPv6 address is used in the global public domain. , the only address.

Here, the IPv6 prefix may be an IPv6 prefix that is stored on the PDN-GW and that corresponds to an identifier of a network domain where the UE is located, or may be a DHCP Reply message sent from the DHCPv6 server to the UE. Parsing the IPv6 prefix, and storing the identifier of the network domain where the UE is located, and the relationship corresponding to the IPv6 prefix, so that when the UE with the same network domain as the UE requests the global IPv6 address, Different UEs of the same network domain have the same IPv6 prefix, increase the available space of the IPv6 address, and improve the utilization of the IPv6 address.

The embodiment of the present invention further provides an apparatus for allocating an IPv6 address, and the device may be a packet data gateway, where the packet data gateway is specifically a PDN-GW, and may also be an S-GW in a PMIP scenario. As shown in FIG. 14, the device includes: a receiving unit 301, a determining unit 302, a sending module 307, an executing module 308, a negotiating unit 309, and a fourth transmitting unit 310.

The negotiating unit 309 is configured to negotiate with the DHCPv6 server whether the DHCPv6 server supports the ability to allocate a global IPv6 address.

The receiving unit 301 is configured to receive a request message for allocating an address for the user equipment UE, where the address allocation request message includes an identifier of a network domain where the UE is located;

The receiving unit 301 is specifically configured to: receive, by the MME, a create session request message, where the create session request message includes an identifier of a network domain where the UE is located, and the create session request message sent by the MME is After receiving the attach request message sent by the UE, the attach request includes the identifier of the network domain where the UE is located.

a fourth sending unit 310, configured to: if the DHCPv6 server supports the capability of the DHCPv6 server to allocate a single IPv6 address, send, by using the MN to the UE, an interface identifier that generates a link local address and whether the DHCPv6 server is An identifier having the ability to allocate the global IPv6 address;

Then, the determining unit 302 determines whether the IPv6 prefix corresponding to the identifier of the network domain where the UE is located is saved. Here, specifically, the PDN-GW checks whether the network where the UE is located is saved. The identifier of the domain corresponds to the IPV 6 prefix.

When the IPv6 prefix corresponding to the identifier of the network domain where the UE is located is saved, the sending module 307 sends the IPv6 prefix to the dynamic host configuration protocol DHCPv6 server, and the DHCPv6 server sends the bearer to the UE. The global IPv6 address of the IPv6 prefix.

When the IPv6 prefix corresponding to the identifier of the network domain where the UE is located is not saved, the execution module 308 parses the DHCP Rep ly message sent by the DHCPv6 server to obtain an IPv6 prefix, and sends the global IPv6 address carrying the IPv6 prefix. And the relationship between the identifier of the network domain where the UE is located and the IPv6 prefix is saved.

Specifically, after receiving the DHCP Reply message sent by the DHCPv6 server, the PDN-GW parses the global IP address of the DHCP Rep1 y message to obtain an identifier of the network domain where the UE is located. Corresponding the IPv6 prefix, and storing, on the PDN-GW, an identifier of a network domain where the UE is located and a relationship corresponding to the IPv6 prefix, and then the PDN-GW forwards the DHCP Reply message to the PDN-GW. The UE, the DHCP Reply message includes a global IPv6 address carrying the IPv6 prefix.

An apparatus for allocating an IPv6 address according to an embodiment of the present invention, by using a viewing unit to check whether an IPv6 prefix corresponding to an identifier of a network domain where the UE is located is saved, the first sending unit includes a global IPv6 of the IPv6 prefix. The address is sent to the UE, or the execution unit allocates an IPv6 prefix to the UE, and saves the identifier of the network domain where the UE is located and the relationship corresponding to the IPv6 prefix, so that the network where the UE is located can be given. When the UE with the same domain requests the global IPv6 address, the same IPv6 prefix is allocated. Compared with the prior art, when the IPv6 address allocation is performed, the IPv6 prefix resource is limited, and the IPv6 address allocation is tight, which is not satisfied with the technical problem of the actual use. The solution provided by the embodiment of the present invention may be allocated to different UEs in the same network domain. The same IPv6 prefix increases the available space of the IPv6 address and increases the utilization of the IPv6 address.

The above is only the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the claims.

Claims

Claim

A sixth-generation Internet Protocol IPv6 address allocation method, comprising: receiving a request message for allocating an address for a user equipment UE, where the request message includes an identifier of a network domain in which the UE is located;

Determining whether a sixth generation Internet Protocol IPv6 prefix corresponding to the identifier of the network domain where the UE is located is stored;

When the IPv6 prefix corresponding to the identifier of the network domain where the UE is located is saved, the IPv6 prefix corresponding to the identifier of the network domain where the UE is located is sent to the UE;

When the IPv6 prefix corresponding to the identifier of the network domain where the UE is located is not saved, the IPv6 prefix is allocated to the UE, the IPv6 prefix is sent to the UE, and the network domain where the UE is located is saved. The relationship between the identifier and the IPv6 prefix.

2. The method for allocating an IPv6 address according to claim 1, wherein the identifier of the network domain comprises an access point name APN, a group identifier, a user group identifier, or the APN, A combination of the group identifier and the user group identifier.

The method for allocating an IPv6 address according to claim 2, further comprising: after the request message for receiving an address for the user equipment UE, the link local address is used to complete communication of the local network Or a local interface identifier, where the global interface identifier is used to generate an IPv6 address with an IPv6 prefix corresponding to the identifier of the network domain where the UE is located.

The method for allocating an IPv6 address according to claim 1 or 2, wherein when the IPv6 prefix corresponding to the identifier of the network domain where the UE is located is stored, the When the I Pv6 prefix corresponding to the identifier of the network domain where the UE is located, the IPv6 prefix corresponding to the identifier of the network domain where the UE is located is sent to the UE, including:

Sending the IPv6 prefix to the dynamic host configuration protocol DHCPv6 server, and sending, by the DHCPv6 server, the global IPv6 address carrying the IPv6 prefix to the UE; When the IPv6 prefix corresponding to the identifier of the network domain where the UE is located is not saved, when the IPv6 prefix corresponding to the identifier of the network domain where the UE is located is not saved, the UE is assigned an IPv6 prefix. And sending the IPv6 prefix to the UE, and saving the identifier of the network domain where the UE is located and the relationship corresponding to the IPv6 prefix include:

Parsing the DHCP Rep ly message sent by the DHCPv6 server to obtain an IPv6 prefix, and transmitting the global IPv6 address carrying the IPv6 prefix to the UE, and saving the identifier of the network domain where the UE is located and the IPv6 prefix Relationship.

The method for allocating an IPv6 address according to claim 4, wherein before the sending the global IPv6 address carrying the IPv6 prefix to the UE, the method further includes:

Negotiating with the DHCPv6 server whether the DHCPv6 server supports the ability to allocate a global IPv6 address;

If the DHCPv6 server supports the capability of the DHCPv6 server to allocate a single IPv6 address, the MME sends an interface identifier for generating a link local address to the UE and whether the DHCPv6 server has the capability of allocating the global IPv6 address. Identifier.

A sixth-generation Internet Protocol IPv6 address allocation method, comprising: sending, to a device that processes an address, a request message for allocating an address, where the request message includes an identifier of a network domain where the user equipment UE is located The identifier of the network domain where the UE is located is used to obtain an IPv6 prefix;

Receiving, by the device that processes the address allocation, the IPv6 prefix obtained according to the identifier of the network domain where the UE is located, and generating a global IPv6 address according to the IPv6 prefix.

The IPv6 address allocation method according to claim 6, wherein the generating the global IPv6 address according to the IPv6 prefix comprises:

A global IPv6 address is generated based on the IPv6 prefix and a unique interface identifier identifying the UE.

The method for allocating an IPv6 address according to claim 7, wherein the unique interface identifier that identifies the UE is an interface identifier generated according to the MAC address; or

The unique interface identifier identifying the UE is the received global interface identifier.

The method for allocating IPv6 addresses according to any one of claims 6-8, wherein the identifier of the network domain comprises an access point name APN, a group identifier, and a user group identifier. Or a combination of the APN, the group identifier, and the user group identifier.

The IPv6 address allocation method according to claim 9, wherein the IPv6 obtained by the device that receives the processing address allocation is obtained according to an identifier of a network domain where the UE is located. Before the prefix, the method also includes:

And receiving, by the device that processes the address allocation, an interface identifier that is sent by the mobile management network element E to generate a link local address, where the link local address is used to complete communication of the local network; or

An interface identifier and a global interface identifier for generating a link local address sent by the device of the processing address allocation by the mobile management network element E, the global interface identifier being used for identifier of a network domain where the UE is located The IPv6 prefix corresponding to the character generates an IPv6 address.

The method for allocating an IPv6 address according to claim 6 or 9, wherein the receiving, by the device receiving the processing address allocation, the identifier obtained according to an identifier of a network domain where the UE is located An IPv6 prefix, and generating a global IPv6 address according to the IPv6 prefix, includes:

Receiving a DHCP Rep ly message sent by the DHCPv6 server, where the DHCP Reply message includes a global IPv6 address carrying the IPv6 prefix.

A device for allocating a sixth-generation Internet Protocol IPv6 address, comprising: a receiving unit, configured to receive a request message for allocating an address for a user equipment UE, where the request message includes a network domain where the UE is located Identifier

a first sending unit, configured to: when storing an IPv6 prefix corresponding to an identifier of a network domain where the UE is located, send an IPv6 prefix corresponding to an identifier of a network domain where the UE is located to the UE; And when the IPv6 prefix corresponding to the identifier of the network domain where the UE is located is not saved, the IPv6 prefix is allocated to the UE, the IPv6 prefix is sent to the UE, and the UE is saved. The relationship between the identifier of the network domain and the IPv6 prefix.

13. An apparatus for IPv6 address allocation according to claim 12, wherein: The device further includes: an interface identifier of the address, where the link local address is used to complete communication of the local network; or an interface identifier of the address and a global interface identifier, where the global interface identifier is used for the UE The IPv6 prefix corresponding to the identifier of the network domain where the network is located generates an IPv6 address.

The device for allocating an IPv6 address according to claim 12, wherein the first sending unit comprises:

And a sending module, configured to send the IPv6 prefix to the dynamic host configuration protocol DHCPv6 server, and send, by the DHCPv6 server, the global IPv6 address that carries the IPv6 prefix to the UE.

The apparatus for allocating an IPv6 address according to claim 14, wherein the execution unit comprises: an execution module, configured to parse a DHCP Rep ly message sent by the DHCPv6 server to obtain an IPv6 prefix, which is to be carried The global IPv6 address of the IPv6 prefix is sent to the UE, and the identifier of the network domain where the UE is located and the relationship corresponding to the IPv6 prefix are saved.

The device of the IPv6 address allocation according to claim 12, wherein the device further comprises:

a negotiating unit, configured to negotiate with the DHCPv6 server whether the DHCPv6 server has the capability of supporting allocation of a global IPv6 address;

a fourth sending unit, configured to: if the DHCPv6 server supports the capability of the DHCPv6 server to allocate a single IPv6 address, send, by using the MN, an interface identifier that generates a link local address and whether the DHCPv6 server has Support for assigning the identity of the global IPv6 address capability.

A device for allocating a sixth-generation Internet Protocol IPv6 address, comprising: a sending unit, configured to send, to a device that processes an address, a request message for allocating an address, where the request message includes a user equipment UE An identifier of the network domain, where the identifier of the network domain where the UE is located is used to obtain an IPv6 prefix;

An execution unit, configured to receive, by the device that processes the address allocation, according to the network where the UE is located The IPv6 prefix obtained by the identifier of the domain, and generating a global IPv6 address according to the IPv6 prefix.

The apparatus for allocating an IPv6 address according to claim 17, wherein the execution unit comprises: a generating module, configured to generate, according to the IPv6 prefix, a unique interface identifier that identifies the UE A global IPv6 address.

The device for allocating an IPv6 address according to claim 18, wherein the device further comprises:

a first receiving unit, configured to receive, by the device that processes the address allocation, an interface identifier that generates a link local address sent by the mobility management network element MME, where the link local address is used to complete communication of the local network; or

a second receiving unit, configured to receive, by the device that processes the address allocation, an interface identifier that generates a link local address and a global interface identifier that is sent by the mobility management network element MME, where the global interface identifier is used by the UE The IPv6 prefix corresponding to the identifier of the network domain where the network is located generates an IPv6 address.

The apparatus for allocating an IPv6 address according to claim 17, wherein the execution unit comprises:

The receiving module is configured to receive a DHCP Reply message sent by the DHCPv6 server of the dynamic host configuration protocol, where the DHCP Reply message includes a global IPv6 address carrying the IPv6 prefix.