WO2013117172A1

WO2013117172A1 - Private network address allocation method, device, and system

Info

Publication number: WO2013117172A1
Application number: PCT/CN2013/073470
Authority: WO
Inventors: 刘海; 靳维生
Original assignee: 华为技术有限公司
Priority date: 2012-02-09
Filing date: 2013-03-29
Publication date: 2013-08-15
Also published as: CN103248716A; CN103248716B

Abstract

The embodiments of the present invention disclose a private network address allocation method, comprising: receiving from a terminal a Dynamic Host Configuration Protocol (DHCP) request for a private network address allocation; acquiring from an address allocation network element a private network address according to the DHCP request, and continuing to acquire a private network address from the address allocation network element when the acquired private network address conflicts with any stored private network address; when the private network address acquired from the address allocation network element does not conflict with any stored private network address, returning a DHCP response message to the terminal, the DHCP response message carrying the acquired private network address. The embodiments of the present invention also disclose a private network address allocation method, device, and system. The present invention ensures that the private network address returned to the terminal does not conflict with the private network addresses of other terminals, thereby ensuring the terminal can conduct normal network communications.

Description

Private network address allocation method, device and system

This application claims priority to Chinese Patent Application No. 201210028822.1, entitled "A Private Network Address Assignment Method, Apparatus, and System" on February 9, 2012, the entire contents of which are incorporated by reference. In this application. Technical field

The present invention relates to the field of communications technologies, and in particular, to a private network address allocation method, apparatus, and system. Background technique

IPV4 (Internet Protocol version 4: Internet Protocol version 4) addresses can be classified into public network addresses and private network addresses. The private network address is unique and valid in a local area network. Different terminals can use the same private network address in different local area networks.

In the same local area network, the private network address of the terminal may come from the packet data network gateway PGW or LMA (Local Mobility Anchor) of different local area networks. Since the PGW or LMA of different LANs may be assigned the same private network address, there may be cases where the private addresses of the two terminals in the same LAN are the same. If the private network addresses of the two terminals are the same, an address conflict is considered to occur, and one of the two terminals with the same private network address cannot perform network communication normally. Summary of the invention

The technical problem to be solved by the embodiments of the present invention is to provide a private network address allocation method, device and system, which ensure that the terminal can perform normal network communication.

In one aspect, the present invention provides a private network address allocation method, including:

Receiving a dynamic host configuration protocol DHCP request from the terminal for requesting allocation of a private network address;

Obtaining a private network address from the address allocation network element according to the DHCP request, and continuing to obtain a private network address from the address allocation network element when the obtained private network address conflicts with the stored private network address; When the private network address obtained from the address allocation network element does not conflict with the stored private network address, a DHCP response message is returned to the terminal, and the obtained DHCP response message carries the obtained private network address.

In one aspect, the present invention provides another private network address allocation method, including:

Obtaining a private network address from the address allocation network element according to the DHCP request;

When the obtained private network address conflicts with the stored private network address, the mapped private network address for uniquely identifying the terminal in the local area network is allocated, and the obtained private network address and the allocated mapping are established. Mapping of private network addresses;

Returning a DHCP response message to the terminal, where the DHCP response message carries the assigned mapped private network address.

In one aspect, the present invention provides a method for obtaining a private network address, including:

Sending a dynamic host configuration protocol DHCP request for requesting allocation of a private network address to the access gateway;

Receiving a DHCP response message returned by the access gateway, where the DHCP response message carries a private network address, where the private network address is determined by the access gateway, and is used to uniquely identify the terminal in the local area network.

In one aspect, the present invention provides a private network address allocation apparatus, including:

a receiving module, configured to receive a dynamic host configuration protocol DHCP request from the terminal for requesting allocation of a private network address;

An obtaining module, configured to obtain a private network address from the address allocation network element according to the DHCP request received by the receiving module;

a control module, configured to: when the private network address obtained by the acquiring module conflicts with the stored private network address, control the acquiring module to continue to obtain a private network address from the address allocation network element;

a returning module, configured to return a DHCP response message to the terminal when the private network address obtained by the acquiring module does not conflict with the stored private network address, where the DHCP response message carries the private acquired by the acquiring module Web address.

a receiving module, configured to receive a dynamic host configuration from the terminal for requesting allocation of a private network address Protocol DHCP request;

a processing module, configured to: when the private network address obtained by the obtaining module conflicts with the stored private network address, allocate a mapped private network address for uniquely identifying the terminal in the local area network, and establish the acquired by the acquiring module The mapping relationship between the private network address and the assigned mapped private network address;

The returning module is configured to return a DHCP response message to the terminal, where the DHCP response message carries a mapped private network address allocated by the processing module.

In one aspect, the present invention provides a terminal, including:

a terminal sending module, configured to send a dynamic host configuration protocol DHCP request for requesting a private network address to the access gateway;

a terminal receiving module, configured to receive a DHCP response message generated by the access gateway, where the DHCP response message carries a private network address, where the private network address is determined by the private network address allocation device, and is used to uniquely identify the terminal.

In one aspect, the present invention provides a private network address allocation system, including:

a terminal, configured to send a dynamic host configuration protocol DHCP request to allocate a private network address to the access gateway;

An access gateway, configured to receive the DHCP request from the terminal, and obtain a private network address from the address allocation network element according to the DHCP request;

An address allocation network element, configured to allocate a private network address, and return the allocated private network address to the access gateway;

The access gateway is further configured to: when the obtained private network address conflicts with the stored private network address, continue to obtain a private network address from the address allocation network element; and when the obtained private network When the address does not conflict with the stored private network address, a DHCP response message is sent to the terminal, and the DHCP response message carries the acquired private network address.

An access gateway, configured to receive the DHCP request from the terminal, according to the DHCP Request, obtain a private network address from the address allocation network element;

The access gateway is further configured to: when the obtained private network address conflicts with the stored private network address, allocate a mapped private network address for uniquely identifying the terminal, and establish the obtained private network. A mapping relationship between the address and the allocated mapped private network address, and a returning a DHCP response message to the terminal, where the DHCP response message carries the allocated mapped private network address.

After receiving the DHCP request from the terminal, the embodiment of the present invention obtains the private network address from the address allocation network element, and continues to allocate the network element from the address when the obtained private network address conflicts with the stored private network address. Obtaining a private network address, or assigning a mapped private network address that uniquely identifies the terminal, to obtain a private network address for uniquely identifying the terminal in the local area network, and obtaining a private network uniquely identifying the terminal The address is returned to the terminal. In this way, it is ensured that the private network address returned to the terminal is unique in the local area network, that is, the private network address returned to the terminal does not conflict with the private network address of other terminals in the local area network, thereby ensuring that the terminal can perform Normal network communication. 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 creative work.

1 is a schematic flow chart of an embodiment of a private network address allocation method provided by the present invention;

2 is a schematic flow chart of an embodiment of step S12 in FIG. 1 of the present invention;

3 is a schematic flow chart of another embodiment of a private network address allocation method provided by the present invention;

4 is a schematic flow chart showing another embodiment of a private network address allocation method provided by the present invention;

FIG. 5 is a schematic flowchart of an embodiment of a method for acquiring a private network address according to the present invention. Figure

6 is a schematic structural diagram of an embodiment of a private network address allocation apparatus provided by the present invention;

FIG. 7 is a schematic structural diagram of another embodiment of a private network address allocation apparatus according to the present invention; FIG.

FIG. 8 is a schematic structural diagram of another embodiment of a private network address allocation apparatus according to the present invention; FIG.

9 is a schematic structural diagram of a terminal provided by the present invention;

FIG. 10 is a schematic structural diagram of an embodiment of a private network address allocation system according to the present invention; FIG.

FIG. 11 is a schematic structural diagram of another embodiment of a private network address allocation system according to the present invention. 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.

When assigning a private network address to a terminal, you can use the following two methods:

(1) The terminal is assigned a private network address using the ΡΜΙΡνό (roxy mobile Internet Protocol version 6) protocol. Specifically, when the terminal is attached to the MAG (mobile access gateway), the MAG uses the ΡΜΙΡνό protocol (proxy binding update PBU message or proxy binding response 消息 message) from the LMA (Local Mobility Anchor: Home Mobility Anchor) Point) Obtain a private network address, and send the obtained private network address to the terminal. The MAG can exchange information with the LMAs of different LANs to obtain private network addresses.

(2) After accessing the WLAN (Wireless Local Area Networks) network, the terminal accesses the 3GPP (3rd Generation Partnership Project) core network through the S2a interface to obtain the private network address. Specifically, the terminal accesses the WLAN. Then, the WLAN sends a session establishment request message to the packet data network gateway PGW by using the general packet radio service tunnel GTP protocol, and the PGW allocates a private network address and returns it to the WLAN, and the WLAN returns the received private network address to the terminal. The WLAN can exchange information with the PGWs of different local area networks to obtain a private network address.

If the private network addresses of the two terminals are the same, an address conflict is considered to occur, causing one of the two terminals with the same private network address to fail to perform network communication.

In order to solve the above technical problem, the present invention provides the following technical solutions:

The embodiment of the present invention provides a method for allocating a private network address, and the execution subject may be an access gateway or another network device having an access gateway function. Description.

Referring to FIG. 1 , it is a schematic flowchart of an embodiment of a method for allocating a private network address according to the present disclosure. The method includes:

Step S11, receiving a dynamic host configuration protocol DHCP request from the terminal for requesting allocation of a private network address;

In this step, after the terminal is powered on, a DHCP request for requesting a private network address is automatically sent to the access gateway. The access gateway may be an MAG or a WLAN access network.

Step S12: Obtain a private network address from the address allocation network element according to the DHCP request, and continue to obtain a private network from the address allocation network element when the obtained private network address conflicts with the stored private network address. Address

In this step, after receiving the DHCP request sent by the terminal, the access gateway knows that the terminal request allocates a private network address. Then, the access gateway exchanges information with the address allocation network element to obtain a private network address from the address allocation network element.

The private network address obtained by the access gateway from the address allocation network element may or may not conflict with the private network address stored by the access gateway. The private network address stored by the access gateway is a private network address that is stored by the access gateway and returned to other terminals in the local area network. After returning a private network address to the terminal, the access gateway stores the private network address that has been returned to the terminal for subsequent judgment and whether the private network address obtained from the address allocation network element conflicts.

When the private network address obtained by the access gateway conflicts with the private network address stored by the access gateway, the access gateway needs to continue to obtain the private network address from the address allocation network element. When the access gateway obtains the private network If the address does not conflict with the stored private network address, the process proceeds to step S13.

Wherein, when the access gateway interacts with the address allocation network element for information interaction, the GTP protocol or the ΡΜΙΡνό protocol may be used. The address allocation network element can be a PGW or an LMA.

Step S13: When the private network address obtained from the address allocation network element does not conflict with the stored private network address, the DHCP response message is returned to the terminal, where the DHCP response message carries the obtained private network. address.

The access gateway returns the private network address obtained from the address allocation network element to the terminal in the form of a DHCP response message.

In this embodiment, after receiving the DHCP request from the terminal, the access gateway obtains the private network address from the address allocation network element, and when the obtained private network address conflicts with the stored private network address, the secondary address continues. The private network address is obtained by the distribution network element, and when the obtained private network address does not conflict with the stored private network address, the obtained private network address that does not conflict with the stored private network address is returned to the terminal. . In this way, the access gateway ensures that the private network address returned to the terminal is unique in the local area network, that is, the private network address returned to the terminal does not conflict with the private network address of other terminals in the local area network, thereby ensuring the The terminal is capable of normal network communication.

Please refer to FIG. 2, which is a schematic flowchart of an embodiment of step S12 in FIG. 1 of the present invention. Specifically, the obtaining, according to the DHCP request, the private network address from the address allocation network element, and continuing to obtain the private information from the address allocation network element when the obtained private network address conflicts with the stored private network address Web address, including:

Step S21: Send a distribution private network address request message to the address allocation network element according to the DHCP request.

In this step, after receiving the DHCP request, the access gateway sends a request message for assigning a private network address to the address allocation network element. Specifically, the access gateway may send a request to allocate a private network address message to the address allocation network element in the following two manners:

(1) When the access gateway uses the GTP protocol to exchange information with the address allocation network element, the access gateway sends a setup session request message to the address allocation network element.

(2) When the access gateway uses the PMIPv6 protocol to exchange information with the address allocation network element, the access gateway sends a PBU message to the address allocation network element.

After receiving the private network address request message sent by the access gateway, the address allocation network element will A corresponding private network address is assigned and returned to the access gateway. Specifically, the address allocation network element returns the allocated private network address to the access gateway in the form of a response message.

Step S22, receiving a response message returned by the address allocation network element, where the response message carries a private network address allocated by the address allocation network element after receiving the allocated private network address request message;

There are two types of private network address messages that are sent by the access gateway to the address allocation network element. Correspondingly, there are two types of private network addresses received by the access gateway and returned by the address allocation network element:

(1) When the access gateway uses the GTP protocol to exchange information with the address allocation network element, the access gateway receives the setup session response message returned by the address assignment network element, and the setup session response message carries the address allocation network element assignment. Private network address.

(2) When the access gateway uses the PMIPv6 protocol to exchange information with the address allocation network element, the access gateway receives the PBA message returned by the address allocation network element, and the PBA message carries the private network address allocated by the address allocation network element.

Step S23: Determine whether the received private network address conflicts with the stored private network address. The access gateway determines whether the received private network address conflicts with the stored private network address, and specifically includes:

The access gateway compares the received private network address with the stored private network address in the database, and determines whether the received private network address is the same as the stored private network address; If the received private network address conflicts with the stored private network address, the process proceeds to step S24. If not, the received private network address does not conflict with the private network address stored by the access gateway. Exit the process.

Step S24, sending a release private network address message to the address allocation network element, and then repeatedly executing S21-S23;

In this step, the access gateway may send a release private network address message to the address allocation network element in two forms:

(1) When the access gateway uses the GTP protocol to exchange information with the address allocation network element, the access gateway sends a delete session request message to the address allocation network element.

(2) When the access gateway uses the PMIPv6 protocol to exchange information with the address allocation network element, The inbound gateway sends a PBU message to the address allocation network element, where the PBU message carries the obtained private network address, and sets a lifecycle lifetime=0, and lifetime=0 is used to indicate that the address allocation network element releases the obtained private network address. .

After receiving the private network address message sent by the access gateway, the address allocation network element releases the private network address allocated in step S22.

After the access gateway sends the release private network address message, the process proceeds to step S21, and then the access gateway loops through steps S21-S23 until the determination result of step S23 is no, that is, until the address allocation network element allocation is determined. The private network address is different from the private network address that the access gateway has stored, and does not conflict.

Further, the release private network address message sent in step S24 carries an indication message for instructing the address allocation network element to allocate a new private network address.

Specifically, when the access gateway sends a release private network address message to the address allocation network element, the released private network address message sent in step S24 carries a cell, for example, carried in the delete session request message or the PBU message. A cell, the cell is used to instruct the address allocation network element to allocate a new private network address. After receiving the message of releasing the private network address, the address allocation network element allocates a new private network address according to the instruction of releasing the private network address message, thereby avoiding the private network address allocated before the address allocation network element continues to be allocated. Access gateway problem.

Alternatively, when the access gateway performs the network step S24 and performs the step S21 again, the allocated private network address request message sent in the step S21 carries an indication message for instructing the address allocation network element to allocate a new private network address.

Specifically, when the access gateway sends a release private network address message to the address allocation network element and sends a distribution private network address request message to the address allocation network element again, the access gateway may carry a message in the sent private network address request message. The element, for example, carries a cell in the sent setup session request message or PBU message, and the cell is used to indicate that the address allocation network element allocates a new private network address. After receiving the message of releasing the private network address, the address allocation network element allocates a new private network address according to the instruction of releasing the private network address message, thereby avoiding the private network address allocated before the address allocation network element continues to be allocated. Access gateway problem.

Referring to FIG. 3, it is a schematic flowchart of another embodiment of a method for allocating a private network address according to the present disclosure. The method includes: Step S31, receiving a dynamic host configuration protocol DHCP request from the terminal for requesting allocation of a private network address;

The operation of this step is the same as the operation of step S11 in the embodiment shown in Fig. 1, and will not be described in detail herein.

Step S32: Obtain a private network address from the address allocation network element according to the DHCP request. In this step, after receiving the DHCP request sent by the terminal, the access gateway knows that the terminal request allocates a private network address. Then, the access gateway exchanges information with the address allocation network element to obtain a private network address from the address allocation network element.

The private network address obtained by the access gateway from the address allocation network element may or may not conflict with the private network address stored by the access gateway. When the private network address obtained by the access gateway from the address allocation network element conflicts with the private network address stored by the access gateway, the process proceeds to step S33. When the private network address obtained by the access gateway from the address allocation network element does not conflict with the private network address stored by the access gateway, the flow proceeds to step S35.

The stored private network address is a private network address that is stored by the access gateway and returned to other terminals in the local area network. After the access gateway returns a private network address to the terminal, the private network address that has been returned to the terminal is stored for subsequent judgment and whether the private network address obtained from the address allocation network element conflicts.

Step S33, when the obtained private network address conflicts with the stored private network address, assigning a mapped private network address for uniquely identifying the terminal in the local area network, and establishing the obtained private network address and the Map the mapping of private network addresses;

In this step, when the private network address obtained by the access gateway conflicts with the stored private network address, the access gateway also allocates the mapped private network address of the local area network to which the access gateway belongs. When the access gateway allocates the mapped private network address, it is different from the address allocation network element, and therefore accesses the local area network (that is, only the terminal in the local area network to which the access gateway belongs). The gateway can ensure that the mapped private network addresses are not in conflict with each other, that is, the currently mapped private network address is different from the mapped private network address that the access gateway has assigned to other terminals. Therefore, the mapped private network address allocated by the access gateway can uniquely identify a terminal in the local area network to which the access gateway belongs. After the mapping of the private network address is configured, the access gateway further establishes a mapping relationship between the private network address obtained in step S32 and the mapped private network address allocated in this step. A private network address obtained by the access gateway is mapped to a mapped private network address allocated by the access gateway.

Step S34, returning a DHCP response message to the terminal, where the DHCP response message carries the mapped private network address;

Step S35: When the obtained private network address does not conflict with the stored private network address, return a DHCP response message to the terminal, where the DHCP response message carries the obtained private network address.

In this embodiment, after receiving the DHCP request from the terminal, the access gateway obtains the private network address from the address allocation network element, and when the obtained private network address does not conflict with the stored private network address, the obtained private The network address is returned to the terminal; and when the obtained private network address conflicts with the stored private network address, a mapping private network address is assigned, and the mapping relationship between the obtained private network address and the allocated mapped private network address is established. And return the assigned mapped private network address to the terminal. The obtained private network address or the assigned mapped private network address can uniquely identify a terminal in the local area network. Therefore, the access gateway returns the private network address of the terminal (the private network address or access obtained from the address allocation network element) The mapped private network address assigned by the gateway does not conflict with the private network address of other terminals in the local area network, thus ensuring that the terminal can perform normal network communication. After the assigned private network address is returned to the terminal, when the terminal has an uplink IP packet to be transmitted, the private network address allocated by the address allocation network element has a mapping relationship with the mapped private network address of the terminal, so the access gateway The source IP address of the uplink IP packet (that is, the mapped private network address assigned by the access gateway) is replaced with the private network address allocated by the address allocation network element, and the uplink IP packet is sent to the address allocation network element. Correspondingly, when the address allocation network element has a downlink IP packet to be transmitted to the terminal, the access gateway needs to replace the destination address of the downlink IP packet (that is, the private network address allocated by the address allocation network element) with the And mapping the private network address allocated by the gateway, and sending the downlink IP packet to the terminal. In this way, normal network communication of the terminals in the local area network is achieved.

It should be noted that, in step S32, after obtaining the private network address from the address allocation network element, the access gateway may directly allocate a mapped private network address, and establish an assigned mapped private network address and acquired. Mapping between private network addresses, because of the mapped private network assigned by the access gateway The address can uniquely identify a terminal within its local area network, thus enabling normal network communication of terminals within the local area network.

Referring to FIG. 4, it is a schematic flowchart of another embodiment of an IPV4 private network address allocation method provided by the present invention, where the method includes:

Step S41: Receive a dynamic host configuration protocol from the terminal for requesting allocation of a private network address.

DHCP request;

Step S42: Send a distribution private network address request message to the address allocation network element according to the DHCP request.

Step S43, receiving a response message returned by the address allocation network element, where the response message carries a private network address allocated by the address allocation network element after receiving the allocated private network address request message;

The operations of steps S42-S43 correspond to the operations of step S32 in the embodiment shown in FIG. Step S44: It is determined whether the received private network address conflicts with the stored private network address. The operation of step S44 is the same as the operation of step S23 in the embodiment shown in FIG. 2, and the description is not repeated here. If the result of the determination is a conflict, the flow proceeds to step S45. If the result of the determination is that there is no conflict, the flow proceeds to step S47.

Step S45: Allocating a mapped private network address for uniquely identifying the terminal in the local area network, and establishing a mapping relationship between the obtained private network address and the mapped private network address;

Step S46, returning a DHCP response message to the terminal, where the DHCP response message carries the mapped private network address;

Step S47: Return a DHCP response message to the terminal, where the DHCP response message carries the obtained private network address.

The operation of step S45 to step S47 is equivalent to the operation of step S33 to step S35 in the embodiment shown in FIG. 3, and is not described in detail herein.

Correspondingly, referring to FIG. 5, the method for obtaining a private network address is provided by the present invention. The method may be a terminal, where the method specifically includes:

Step S51: Send a dynamic host configuration protocol DHCP request for requesting allocation of a private network address to the access gateway;

When the terminal is powered on, it will automatically send a DHCP request requesting to assign a private network address to the access network. turn off. The access gateway may be a MAG or a WLAN access network.

Step S52: Receive a DHCP response message returned by the access gateway, where the DHCP response message carries a private network address, where the private network address is determined by the access gateway, and is used to uniquely identify the terminal in the local area network.

It should be noted that, when determining the private network address returned to the terminal, the access gateway may perform the determination by using the method described in the embodiments shown in FIG. 1 to FIG. 4 above.

In this embodiment, the private network address returned by the access gateway that is received by the terminal can uniquely identify the terminal in the local area network, so that the private network address that the terminal lives and the private network address of other terminals in the regional network do not The conflict, in turn, guarantees normal network communication of the terminal.

The above-mentioned FIG. 1 to FIG. 5 show a detailed description of the private network address allocation method disclosed in the embodiment of the present invention. The apparatus and system using the above method will be described in detail below with reference to FIG. 6-11.

Referring to FIG. 6, FIG. 6 is a schematic structural diagram of an embodiment of a private network address allocation apparatus according to the present invention. The apparatus 6 includes:

The receiving module 61 is configured to receive a dynamic host configuration protocol DHCP request from the terminal for requesting allocation of a private network address;

After the terminal is powered on, the terminal automatically sends a DHCP request for requesting the assignment of the private network address to the receiving module 61 of the device. The receiving module 61 forwards the received DHCP request to the obtaining module 62 after receiving the DHCP request sent by the terminal.

The obtaining module 62 is configured to obtain a private network address from the address allocation network element according to the DHCP request received by the receiving module 61.

The obtaining module 62 knows that the terminal requests to allocate a private network address according to the DHCP request sent by the receiving module 61. Then, the obtaining module 62 exchanges information with the address allocation network element to obtain a private network address from the address allocation network element.

The control module 63 is configured to control the obtaining module 62 to continue to obtain a private network address from the address allocation network element when the private network address acquired by the obtaining module 62 conflicts with the stored private network address; wherein the obtaining module 62 The private network address obtained by the address allocation NE may or may not conflict with the private network address stored by the access gateway. The stored private network address is the private network address stored by the device 6 and returned by the device to other terminals in the local area network. After returning a private network address to the terminal, the device stores the private network address that has been returned to the terminal for subsequent use. Determine whether there is a conflict with the private network address obtained from the address allocation network element.

When the private network address obtained by the obtaining module 62 conflicts with the stored private network address, the control module 63 controls the obtaining module 62 to continue to obtain the IPV4 private network address from the address allocation network element. When the private network address obtained by the obtaining module 62 does not conflict with the stored private network address, the returning module 64 returns the obtained private network address to the terminal.

It should be noted that, when the obtaining module 62 interacts with the address allocation network element, the GTP protocol or the PMIPv6 protocol may be used. Specifically, the address allocation network element may be a PGW or an LMA.

The returning module 64 is configured to: when the private network address obtained by the obtaining module 62 does not collide with the stored private network address, return a DHCP response message to the terminal, where the DHCP response message carries the acquiring module 62. The private network address obtained.

The returning module 64 returns the private network address obtained by the obtaining module 62 to the terminal in the form of a DHCP response message.

In this embodiment, after the receiving module 61 receives the DHCP request from the terminal, the obtaining module 62 obtains the private network address from the address allocation network element, and obtains the private network address and the stored private network address obtained by the obtaining module 62. When the content is not in conflict, the obtained private network address is returned to the terminal through the returning module 64. When the private network address obtained by the obtaining module 62 conflicts with the stored private network address, the control module 63 controls the obtaining module 62 to continue from the control module 63. The address allocation network element obtains the IPV4 private network address, until the private network address obtained by the obtaining module 62 does not conflict with the stored private network address, and finally the obtained private network address that is obtained by the returning module 64 does not conflict with the stored private network address. The private network address is returned to the terminal. In this way, it is ensured that the private network address returned by the returning module 64 to the terminal is unique in the local area network, that is, the private network address returned to the terminal does not conflict with the private network address of other terminals in the local area network, thereby ensuring the said The terminal is capable of normal network communication.

Referring to FIG. 7, FIG. 7 is a schematic structural diagram of another embodiment of a private network address allocation apparatus according to the present invention. The difference between this embodiment and the embodiment shown in FIG. 6 is that the obtaining module 62 includes:

The sending unit 621 is configured to send a distribution private network address request message to the address allocation network element according to the DHCP request received by the receiving module 61.

The sending unit 621 sends the private allocation according to the DHCP request received by the receiving module 61. The network address request message is assigned to the address allocation network element. Specifically, the sending unit 621 may send a request to allocate an IPV4 private network address message to the address allocation network element in the following two manners:

(1) When the sending unit 621 performs information exchange with the address allocation network element by using the GTP protocol, the sending unit 621 sends a setup session request message to the address allocation network element.

(2) When the sending unit 621 uses the PMIPv6 protocol to perform information exchange with the address allocation network element, the sending unit 621 sends a PBU message to the address allocation network element.

The receiving unit 622 is configured to receive a response message returned by the address allocation network element, where the response message carries a private network address that is allocated by the address allocation network element after receiving the allocated private network address request message;

After receiving the assignment private network address request message sent by the sending unit 621, the address allocation network element allocates a corresponding private network address and returns it to the receiving unit 622. Specifically, the address allocation network element returns the assigned private network address to the receiving unit 622 by returning a response message.

There are two forms of the private network address message that are sent by the sending unit 621 to the address allocation network element. Correspondingly, the form of the private network address received by the receiving unit 622 and returned by the address allocation network element also has two types. :

(1) When the sending unit 621 uses the GTP protocol to perform information exchange with the address allocation network element, the receiving unit 622 receives the setup session response message returned by the address allocation network element, where the setup session response message carries the address allocation network element. The assigned private network address.

(2) When the sending unit 621 uses the PMIPv6 protocol to perform information exchange with the address allocation network element, the receiving unit 622 receives the PBA message returned by the address allocation network element, where the PBA message carries the private network address allocated by the address allocation network element. .

The determining unit 623 is configured to determine whether the private network address received by the receiving unit 622 and the stored private network address conflict;

Specifically, the determining unit 623 compares the private network address received by the receiving unit 622 with the private network address stored by the device, to determine the private network address received by the receiving unit 622 and the stored private network. Whether the address conflicts. If the determining unit 623 determines that the private network address received by the receiving unit 622 is the same as the private network address stored by the device, the private network address received by the receiving unit 622 and the private network stored by the device are determined. Address conflict. At this time, the control module 63 controls the sending unit 621 to send a release private network address message to the address allocation network element, and then send the network element. Sending a private network address request message to the address allocation network element;

The control module 63 is specifically configured to: when the determination result of the determining unit 623 is a conflict, that is, when the private network address received by the receiving unit 622 collides with the stored private network address, the sending unit 621 is controlled first. Sending a release private network address message to the address allocation network element, and then sending a distribution private network address request message to the address allocation network element.

The sending unit 621 is further configured to: after the control of the control module 63, send a release private network address message to the address allocation network element, and then send a distribution private network address request message to the address distribution network. yuan.

The sending unit 621 can send the release private network address message to the address allocation network element in two forms:

(1) When the sending unit 621 uses the GTP protocol to perform information exchange with the address allocation network element, the sending unit 621 sends a delete session request message to the address allocation network element.

(2) When the sending unit 621 uses the PMIPv6 protocol to perform information exchange with the address allocation network element, the sending unit 621 sends a PBU message to the address allocation network element, where the PBU message carries the IPV4 private network address, and sets the life cycle. The lifetime=0, lifetime=0 is used to indicate that the address allocation NE releases the IPV4 private network address.

After receiving the private network address message sent by the sending unit 621, the address allocation network element releases the allocated private network address. After sending the release IPV4 private network address message to the address allocation network element, the sending unit 621 further performs: sending a request to allocate a private network address message to the address allocation network element;

It should be noted that, after the determining unit 623 determines that the private network address conflict received by the receiving unit 622, the following operations are performed cyclically:

The sending unit 621 first sends the release private network address message to the address allocation network element, and then sends the release private network address message to the address allocation network element again; the address distribution network element also re-allocates the private network address and returns to the receiving unit 622;

The condition of the above-mentioned bounce loop is: The judging unit 623 judges that the private network address received by the receiving unit 622 is different from the stored private network address, and does not conflict. At this time, the sending unit 621 will not send the release private network address message to the address allocation network element.

Further, the release private network address message sent by the sending unit 621 is carried in the An indication message indicating that the address allocation network element allocates a new private network address.

Specifically, when the sending unit 621 sends the release private network address message to the address allocation network element, the transmitting unit 621 may carry a cell in the release private network address message, for example, in deleting the session request message or the PBU message. Carrying a cell, the cell is used to indicate that the address allocation network element allocates a new private network address. After receiving the message of releasing the private network address, the address allocation network element allocates a new private network address according to the instruction of releasing the private network address message, thereby avoiding the private network address allocated before the address allocation network element continues to be allocated. Access gateway problem.

Or, after the sending unit 621 sends a release private network address message to the address allocation network element, and sends a distribution private network address request message to the address allocation network element again, the sending unit 621 sends the private network. The address request message carries an indication message for instructing the address allocation network element to allocate a new private network address.

Specifically, after the sending unit 621 sends the release private network address message to the address allocation network element, when the sending unit 621 sends the allocation private network address request message to the address allocation network element again, the sending unit 621 may send the sending unit 621. The assigned private network address request message carries a cell. For example, the establishment of the session request message or the PBU message carries a cell, and the cell is used to indicate that the address allocation network element allocates a new private network address. After receiving the message of releasing the private network address, the address allocation network element allocates a new private network address according to the instruction of releasing the private network address message, thereby avoiding the private network address allocated before the address allocation network element continues to be allocated. Access gateway problem.

Referring to FIG. 8, FIG. 8 is a schematic structural diagram of another embodiment of a private network address allocation apparatus according to the present disclosure. The apparatus 8 includes:

The receiving module 81 is configured to receive a dynamic host configuration protocol DHCP request from the terminal for requesting allocation of a private network address;

After the terminal is powered on, the terminal automatically sends a DHCP request for requesting the assignment of the private network address to the receiving module 81 of the device. The receiving module 81 forwards the received DHCP request to the obtaining module 82 after receiving the DHCP request sent by the terminal.

The obtaining module 82 is configured to obtain a private network address from the address allocation network element according to the DHCP request received by the receiving module 81.

The obtaining module 82 knows that the terminal requests to allocate a private network address according to the DHCP request sent by the receiving module 81. Then, the obtaining module 82 performs information interaction with the address allocation network element to Obtain a private network address at the address allocation NE.

The obtaining module 82 specifically includes:

The sending unit 821 is configured to send, according to the DHCP request received by the receiving module 81, a distribution private network address request message to the address allocation network element;

The sending unit 821 sends a distribution private network address request message to the address allocation network element according to the DHCP request received by the receiving module 81. Specifically, the sending unit 821 can send a request to allocate a private network address message to the address allocation network element in the following two manners:

(1) When the sending unit 821 performs information exchange with the address allocation network element by using the GTP protocol, the sending unit 821 sends a setup session request message to the address allocation network element.

(2) When the sending unit 821 uses the PMIPv6 protocol to perform information exchange with the address allocation network element, the sending unit 821 sends a PBU message to the address allocation network element.

The receiving unit 822 is configured to receive a response message returned by the address allocation network element, where the response message carries a private network address that is allocated by the address allocation network element after receiving the allocated private network address request message.

There are two forms of the private network address message that are sent by the sending unit 821 to the address allocation network element. Accordingly, the form of the private network address received by the receiving unit 822 and returned by the address allocation network element also has two types. :

(1) When the sending unit 821 performs the information exchange with the address allocation network element by using the GTP protocol, the receiving unit 822 receives the setup session response message returned by the address allocation network element, where the setup session response message carries the address allocation network element. The assigned private network address.

(2) When the sending unit 821 uses the PMIPv6 protocol to perform information exchange with the address allocation network element, the receiving unit 822 receives the PBA message returned by the address allocation network element, where the PBA message carries the private network address allocated by the address allocation network element. .

The processing module 83 is configured to: when the private network address obtained by the obtaining module 82 conflicts with the stored private network address, allocate a mapped private network address for uniquely identifying the terminal in the local area network, and establish the acquiring module a mapping relationship between the obtained private network address and the allocated mapped private network address; wherein the receiving unit 822 may conflict with the private network address received by the accessing network element and the private network address stored by the access gateway, May not conflict. When the receiving unit 822 conflicts with the private network address that has been stored by the access gateway from the address allocation network element, the control processing module 83 Assign a mapped private network address. When the receiving unit 822 does not collide with the private network address received by the access gateway from the address allocation network element, the control return module 84 operates.

Specifically, if the private network address received by the receiving unit 822 is the same as the private network address that the device 8 has stored, it is determined that the private network address received by the receiving unit 822 conflicts with the private network address that the device 8 has stored. Then, the control processing module 83 assigns the mapped private network address; if not, the control return module 84 returns the private network address received by the receiving unit 822 to the terminal.

The stored private network address is a private network address that is stored by the device 8 and that is returned by the device 8 to other terminals in the local area network from the address allocation network element. After returning a private network address to the terminal, the device stores the private network address that has been returned to the terminal for subsequent judgment on whether the private network address obtained from the address allocation network element conflicts.

The processing module 83 allocates a mapped private network address of the local area network to which the device belongs in the address space of the device. The processing module 83 is different from the address allocation network element because the processing module 83 allocates the mapped private network address based on the local area network to which the device belongs (that is, only the terminal in the local area network to which the device belongs); 83 can ensure that the mapped private network address of the allocation does not conflict, that is, the currently assigned mapped private network address is different from the mapped private network address that the processing module 83 has assigned to other terminals. Therefore, the mapped private network address assigned by the processing module 83 can uniquely identify a terminal within the local area network to which the device belongs.

The processing module 83 further establishes a mapping relationship between the private network address obtained by the obtaining module 82 and the allocated mapped private network address after the mapping of the private network address is allocated. Specifically, the processing module 83 receives the receiving unit 822. A private network address is mapped to a mapped private network address assigned by the processing module 83.

The returning module 84 is configured to return a DHCP response message to the terminal, where the DHCP response message carries the mapped private network address allocated by the processing module 83.

The returning module 84 is further configured to: when the private network address obtained by the obtaining module 82 does not conflict with the stored private network address, return a DHCP response message to the terminal, where the DHCP response message carries The private network address obtained by the obtaining module 82.

In the device of this embodiment, after receiving the DHCP request from the terminal, the receiving module 81 obtains the private network address from the address allocation network element by the obtaining module 82, and obtains the private network address obtained by the obtaining module 82 and the stored private network. When the addresses do not conflict, the returning module 84 will allocate the network elements from the address. The obtained private network address is returned to the terminal, and when the private network address obtained by the obtaining module 82 conflicts with the stored private network address, the processing module 83 allocates a mapped private network address, and establishes the obtained private network address and the allocated private network address. The mapping of the private network address is mapped, and the assigned mapped private network address is returned to the terminal through the return module 84. Since the obtained private network address or the assigned mapped private network address can uniquely identify a terminal in the local area network, the returning module 84 returns the private network address of the terminal (the private network address obtained from the address allocation network element or the allocated network address) The mapping of the private network address does not conflict with the private network address of other terminals in the local area network. This ensures that the terminal can perform normal network communication.

When the device is allocated to the terminal by using the device described in this embodiment, and the assigned mapped private network address is returned to the terminal, when the terminal has an uplink IP packet to be transmitted, the network element is allocated by the address allocation. The private network address is mapped to the mapped private network address of the terminal. Therefore, the access gateway replaces the source address of the uplink IP packet (that is, the mapped private network address allocated by the device) with the private network address allocated by the address allocation network element, and The uplink IP packet is sent to the address allocation network element. Correspondingly, when the address allocation network element has a downlink IP packet to be transmitted to the terminal, the access gateway needs to replace the destination address of the downlink IP packet (that is, the private network address allocated by the address allocation network element) with the device. Assigning a mapped private network address, and transmitting the downlink IP packet to the terminal. In this way, normal network communication of the terminals in the local area network is achieved.

It should be noted that the apparatus described in the foregoing FIG. 6 to FIG. 8 may be an access gateway or other network equipment having an access network function.

Correspondingly, referring to FIG. 9, the present invention further provides a terminal 9, where the 9 includes: a terminal sending module 91, configured to send a dynamic host configuration protocol requesting to allocate a private network address.

DHCP request to the access gateway;

When the terminal is powered on, a DHCP request for assigning a private network address is automatically sent to the private network address allocation device.

The terminal receiving module 92 is configured to receive a DHCP response message generated by the access gateway, where the DHCP response message carries a private network address, where the private network address is determined by the private network address allocation device, and is used to uniquely identify the local area network. Said terminal.

It should be noted that the private network address allocation device described in this step may specifically be the device described in FIG. 6-8.

In this embodiment, the private network address returned by the private network address allocation device received by the terminal can The terminal is uniquely identified in the local area network, so that the private network address of the terminal does not conflict with the private network address of other terminals in the area network, thereby ensuring normal network communication of the terminal.

Referring to FIG. 10, it is a schematic structural diagram of an embodiment of a private network address allocation system provided by the present invention. The system 10 includes:

The terminal 9 is configured to send a dynamic host configuration protocol DHCP request for assigning a private network address to the access gateway;

The access gateway 101 is configured to receive the DHCP request from the terminal 9, and obtain a private network address from the address allocation network element according to the DHCP request.

An address allocation network element 102, configured to allocate a private network address, and return the allocated private network address to the access gateway 101;

The access gateway 101 is further configured to: when the obtained private network address conflicts with the stored private network address, continue to obtain a private network address from the address allocation network element 102; When the obtained private network address does not conflict with the stored private network address, a DHCP response message is sent to the terminal 9. The DHCP response message carries the obtained private network address.

In the system of this embodiment, after receiving the DHCP request from the terminal, the access gateway 101 obtains the private network address from the address allocation network element, and when the obtained private network address does not conflict with the stored private network address, The obtained private network address is returned to the terminal; and when the obtained private network address conflicts with the stored private network address, the private network address is continuously obtained from the address allocation network element until the obtained private network address is stored. The private network address does not conflict, and finally the obtained private network address that does not conflict with the stored private network address is returned to the terminal. In this way, the access gateway 101 ensures that the private network address returned to the terminal is unique in the local area network, that is, the private network address returned to the terminal does not conflict with the private network address of other terminals in the local area network, thereby ensuring The terminal is capable of normal network communication.

Referring to FIG. 11, which is a schematic structural diagram of another embodiment of a private network address allocation system according to the present invention, the system 11 includes:

The terminal 9 is configured to send a dynamic host configuration protocol requesting to allocate an IPV4 private network address to the access gateway;

The access gateway 111 is configured to receive the DHCP request from the terminal, and obtain a private network address from the address allocation network element according to the DHCP request. An address allocation network element 111, configured to allocate a private network address, and return the allocated private network address to the access gateway 111;

The access gateway 111 is further configured to: when the obtained private network address conflicts with the stored private network address, assign a mapped private network address, and establish the obtained private network address and the mapped private network. And mapping the address, and returning a DHCP response message to the terminal 9, where the DHCP response message carries the mapped private network address.

In this embodiment, after receiving the DHCP request from the terminal, the access gateway 111 obtains a private network address from the address allocation network element, and allocates a mapping when the obtained private network address conflicts with the stored private network address. The private network address, and the mapping relationship between the obtained private network address and the mapped private network address, and the assigned mapped private network address are returned to the terminal. The private network address obtained from the address allocation network element or the assigned mapped private network address can uniquely identify a terminal in the local area network. Therefore, the access gateway 111 returns the private network address of the terminal (obtained from the address allocation network element) The private network address or the private network address of the private network address does not conflict with the private network address of other terminals in the local area network, thus ensuring that the terminal can perform normal network communication.

A person skilled in the art can understand that all or part of the process of implementing the above embodiment method can be completed by a computer program to instruct related hardware, and the program can be stored in a computer readable storage medium. In execution, the flow of an embodiment of the methods as described above may be included. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, and those skilled in the art can understand all or part of the process of implementing the above embodiments, and according to the claims of the present invention. The equivalent change is still within the scope of the invention.

Claims

Rights request

A private network address allocation method, comprising:

Obtaining a private network address from the address allocation network element according to the DHCP request, and continuing to obtain a private network address from the address allocation network element when the obtained private network address conflicts with the stored private network address;

When the private network address obtained from the address allocation network element does not conflict with the stored private network address, a DHCP response message is returned to the terminal, and the DHCP response message carries the obtained private network address.

2. The method according to claim 1, wherein the obtaining, according to the DHCP request, a private network address from an address allocation network element, and obtaining the private network address and the stored private network address In case of conflict, the device continues to obtain the private network address from the address allocation network element, including:

Step A: Send a distribution private network address request message to the address allocation network element according to the DHCP request;

Step B: receiving a response message returned by the address allocation network element, where the response message carries a private network address allocated by the address allocation network element after receiving the allocated private network address request message;

Step C: determining whether the received private network address conflicts with the stored private network address; Step D: If the judgment result is a conflict, sending a release private network address message to the address allocation network element, and repeating the execution Step A to step C.

The method of claim 2, wherein the release private network address message sent by step D carries an indication message for instructing the address allocation network element to allocate a new private network address; or

When the step D is performed and the step A is performed again, the allocated private network address request message sent by the step A carries an indication message for instructing the address allocation network element to allocate a new private network address.

A method for allocating a private network address, comprising:

The method of claim 4, wherein the obtaining the private network address from the address allocation network element according to the DHCP request includes:

Sending a distribution private network address request message to the address allocation network element according to the DHCP request; receiving a response message returned by the address allocation network element, where the response message carries the address allocation network element at the receiving end The private network address assigned after the private network address request message is allocated.

A private network address allocation device, comprising:

a control module, configured to: when the private network address obtained by the obtaining module conflicts with the stored private network address, control the acquiring module to continue to obtain a private network address from the address allocation network element;

The device of claim 6, wherein the obtaining module comprises: a sending unit, configured to send and allocate a private network according to the DHCP request received by the receiving module An address request message is allocated to the address network element;

a receiving unit, configured to receive a response message returned by the address allocation network element, where the response message carries a private network address allocated by the address allocation network element after receiving the allocated private network address request message;

a determining unit, configured to determine whether the private network address received by the receiving unit conflicts with the stored private network address;

The control module is specifically configured to: when the determining result of the determining unit is a conflict, control the sending unit to first send a release private network address message to the address allocation network element, and then send a distribution private network address request message to the The address assigns a network element.

The apparatus according to claim 7, wherein the release private network address message sent by the sending unit carries an indication message for instructing the address allocation network element to allocate a new private network address; or

After the sending unit sends a release private network address message to the address allocation network element and sends a distribution private network address request message to the address allocation network element again, the sending unit resends the assigned private network address request message. There is an indication message for instructing the address allocation network element to allocate a new private network address.

A private network address allocation device, comprising:

And a returning module, configured to return a DHCP response message to the terminal, where the DHCP response message carries a mapped private network address allocated by the processing module.

The device according to claim 9, wherein the obtaining module comprises: a sending unit, configured to send a distribution private network address request message to the address distribution network according to the DHCP request received by the receiving module Yuan

And a receiving unit, configured to receive a response message returned by the address allocation network element, where the response message carries a private network address that is allocated by the address allocation network element after receiving the allocated private network address request message.

11. A private network address allocation system, comprising:

The access gateway is further configured to: when the obtained private network address conflicts with the stored private network address, continue to obtain the private network address from the address allocation network element; and when the obtained private network address When the private network address does not conflict with the stored private network address, a DHCP response message is sent to the terminal, and the DHCP response message carries the acquired private network address.

12. A private network address allocation system, comprising:

The access gateway is further configured to: when the obtained private network address conflicts with the stored private network address, allocate a mapped private network address for uniquely identifying the terminal, and establish the obtained private network. a mapping relationship between the address and the mapped private network address, and returning a DHCP response message to the terminal, The DHCP reply message carries the allocated mapped private network address.