WO2014043901A1

WO2014043901A1 - Session method, apparatus, and system for distributed mobility management

Info

Publication number: WO2014043901A1
Application number: PCT/CN2012/081779
Authority: WO
Inventors: 何宁; 朱雷
Original assignee: 华为技术有限公司
Priority date: 2012-09-21
Filing date: 2012-09-21
Publication date: 2014-03-27
Also published as: CN103891316A; CN103891316B

Abstract

Embodiments of the present invention relate to the technical field of communications. Disclosed are a method, an apparatus, and a system for distributed mobility management, which solve a problem of a high cost of an existing session process for mobility management. The method comprises: a first router assigning a first IP address to a mobile node apparatus, and obtaining a previous second IP address of the mobile node apparatus and a third IP address of a communication node; receiving a first session data packet sent by the mobile node apparatus; sending the first session data packet and the second IP address to the communication node by using the first IP address as a source IP address; receiving a second session data packet with the first IP address as a destination IP address from the communication node; directly sending the second session data packet to the mobile node apparatus by using the second IP address as a destination IP address; or sending the second session data packet and the second IP address to the mobile node apparatus. The present invention applies to a distributed mobility management system.

Description

Session method, device and system for distributed mobility management

The present invention relates to the field of communications technologies, and in particular, to a session method, apparatus, and system for distributed mobility management.

BACKGROUND OF THE INVENTION Distributed mobility management is proposed to solve the problems of single point of failure, routing redundancy, and the like of centralized mobility management. In the distributed mobility management, a first-hop access router (AR) of a mobile node (MN) is generally used as a mobility anchor to perform mobility management functions, for example: Mobile user location updates, periodic updates, authentication, power-on access, shutdown exit, and device identification. When the MN moves to the current access router (NAR), it will be attached under nAR, and jtbHt nAR will re-distribute the Internet Protocol (IP) address for the MN, thus making MN When a session is initiated in the nAR network, the IP address assigned by the nAR to the MN can be used to perform data interaction with a communication node (Correspondent Node, CN for short). Currently, if the MN is in a previous access router (pAR), the pAR allocates an IP address to the MN, and the MN enters the nAR network after initiating a session in the pAR network. The session initiated by the MN in the pAR network uses the IP address assigned by the nAR to the MN, which will cause the session initiated by the MN in the pAR network to be interrupted. In the process of implementing the embodiments of the present invention, the inventors have found that at least the following problems exist in the prior art:

In order to ensure that the session initiated by the MN in the pAR network is not interrupted, a communication tunnel needs to be established between the pAR network and the nAR network, or a communication tunnel is established between the CN and the nAR network, and the establishment of the communication tunnel requires a large cost. The problem of high transaction cost of the entire distributed mobility management session. Summary of the invention

The embodiments of the present invention provide a session method, apparatus, and system for distributed mobility management, which can solve the problem of high transaction cost of the entire distributed mobility management in the prior art. In order to achieve the above object, the present invention adopts the following technical solutions: In a first aspect, an embodiment of the present invention provides a session method for distributed mobility management, including: a first router assigning a first IP address to a mobile node device; a router acquiring a second IP address and a third IP address of the communication node, wherein the second IP address is allocated by the second router where the mobile node device is located for the mobile node device; The first session data packet sent by the mobile node device; the first router sends the first session data packet to the communication node by using the first IP address as a source IP address, and the second IP address An address is sent to the communication node to enable After receiving the first session data packet, the communication node uses the second IP address as a final source IP address, and submits the first session data packet and the second IP address to the communication. The upper layer of the node's IP layer;

Receiving, by the first router, the second session data packet with the third IP address as the source IP address and the first IP address as the destination IP address;

Sending, by the first router, the second session data packet to the mobile node device by using the second IP address as the destination IP address, so that after the mobile node device receives the second session data packet, Taking the second IP address as a final destination IP address, and submitting the second session data packet and the second IP address to an upper layer of an IP layer of the mobile node device; or

Transmitting, by the first router, a second session data packet to the mobile node device, and transmitting the second IP address to the mobile node device, so that the mobile node device receives the second session data After the packet, the second IP address is used as the final destination IP address, and the second session data packet and the second IP address are delivered to the upper layer of the IP layer of the mobile node device.

With reference to the first aspect, in a first implementation manner of the first aspect, the receiving, by the first router, the first session data packet sent by the mobile node device includes:

The first router receives the first session data packet of the mobile node device with the second IP address as the source IP address and the third IP address as the destination IP address. In the second implementation manner of the first aspect, the first router sends the first router to the communication node by using the first IP address as a source IP address. Before the session packet, including:

The first router replaces the second IP address at the source IP address field in the first session data packet with the first IP address.

With reference to the first aspect, in a third implementation manner of the first aspect, the receiving, by the first router, the first session data packet sent by the mobile node device includes:

The first router receives the first session data packet of the mobile node device with the first IP address as the source IP address and the third IP address as the destination IP address.

With reference to the third implementation manner, in a fourth implementation manner of the first aspect, the receiving, by the first router, the mobile node device, using the first IP address as a source IP address, Before the third IP address is the first session data packet of the destination IP address, the method includes:

The first router receives a router request message sent by the mobile node device, where the router request message carries a first flag bit, the first flag bit is a first value, and the first value is used to indicate The mobile node device will perform the sending of the first session data packet by using the first IP address as a source IP address;

The first router establishes a binding relationship with the communication node by using a proxy binding update message, where the proxy binding update message carries the first flag bit, the first IP address, and the second IP address; Receiving, by the first router, a proxy binding response message sent by the communication node with respect to the proxy binding update message, where the proxy binding response message is used to indicate that the communication node agrees to the mobile node device The first IP address is a source IP address for transmitting the first session data packet.

With reference to the first aspect, the first implementation manner, the second implementation manner, the third implementation manner, and the fourth implementation manner, the fifth implementation manner in the first aspect The acquiring, by the first router, the second IP address and the third IP address of the communication node, includes:

The first router acquires session information of the mobile node device by using a centralized device, where the centralized device is used to record session information of the mobile node device, and the session information includes an identity flag of the mobile node device. The second IP address and the third IP address.

With reference to the first aspect, the first implementation manner, the second implementation manner, the third implementation manner, and the fourth implementation manner, the sixth implementation manner in the first aspect The acquiring, by the first router, the second IP address and the third IP address of the communication node, includes:

The first router acquires session information of the mobile node device from the second router, where the session information includes an identity identifier of the mobile node device, the second IP address, and a third IP address.

With reference to the first aspect, the first implementation manner, the second implementation manner, and the third In a seventh implementation manner of the first aspect, the first router acquires the second IP address and the third IP address of the communication node, and the method includes:

The first router acquires session information from the mobile node device, and the session information includes an identity identifier of the mobile node device, the second IP address, and a third IP address.

In a second aspect, an embodiment of the present invention provides a session method for distributed mobility management, including:

After attaching to the first router, the mobile node device receives the first IP address allocated by the first router;

Transmitting, by the mobile node device, the first session data packet to the first router, so that the first router sends the first session data packet to the communication node by using the first IP address as a source IP address, and The second IP address of the second router where the mobile node device is located is sent to the communication node, so that after receiving the first session data packet, the communication node ends with the second IP address. Source IP address, and submit the first session data packet and the second IP address to an upper layer of a communication node's IP layer;

Receiving, by the mobile node device, a second session data packet sent by the first router with the second IP address as a destination IP address; or

The mobile node device receives a second session data packet sent by the first router and the second IP address; After receiving the second session data packet, the mobile node device uses the second IP address as a final destination IP address, and submits the second session data packet and the second IP address to the mobile The upper layer of the IP layer of the node device.

With reference to the second aspect, in a first implementation manner of the second aspect, the sending, by the mobile node device, the first session data packet to the first router includes:

The mobile node device sends the first session data packet to the first router by using the second IP address as a source IP address and the third IP address as a destination IP address.

With reference to the second aspect, in a second implementation manner of the second aspect, the sending, by the mobile node device, the first session data packet to the first router includes:

The mobile node device sends the first session data packet to the first router by using the first IP address as a source IP address and the third IP address as a destination IP address.

With reference to the second implementation manner, in a third implementation manner of the second aspect, the mobile node device uses the first IP address as a source IP address and the third IP address as a destination Before sending the first session data packet to the first router, the method includes: the mobile node device sending a router request message to the first router, where the router request message carries a first flag bit, where The first flag is a first value, and the first value is used to indicate that the mobile node device sends the first session data packet by using the first IP address as a source IP address.

In a third aspect, an embodiment of the present invention provides a first router, including: a first allocation unit, configured to allocate a first IP address to the mobile node device;

a first acquiring unit, configured to acquire a second IP address and a third IP address of the communication node, where the second IP address is allocated by the second router where the mobile node device is located for the mobile node device;

a first receiving unit, configured to receive a first session data packet sent by the mobile node device, where the first sending unit is configured to use the first IP address allocated by the first allocating unit as a source IP address to the communication node Transmitting, by the first receiving unit, the first session data packet, and sending the second IP address obtained by the first acquiring unit to the communication node, so that the communication node receives the first After the session data packet, the second IP address is used as the final source IP address, and the first session data packet and the second IP address are delivered to an upper layer of the IP layer of the communication node;

a second receiving unit, configured to receive, by the communications node, a second session data packet with the third IP address as the source IP address and the first IP address as the destination IP address;

The first sending unit is further configured to send, by using the second IP address obtained by the first acquiring unit, the second session data packet received by the second receiving unit to the mobile node device So that the mobile node device, after receiving the second session data packet, uses the second IP address as a final destination IP address, and the second session data packet and the second IP address. Submitted to the upper layer of the IP layer of the mobile node device; or

The first sending unit is further configured to send the second receiving order to the mobile node device Receiving the second session data packet, and transmitting the second IP address obtained by the first obtaining unit to the mobile node device, so that the mobile node device after receiving the second session data packet And the second IP address is the final destination IP address, and the second session data packet and the second IP address are delivered to an upper layer of the IP layer of the mobile node device.

With reference to the third aspect, in a first implementation manner of the third aspect, the first receiving unit is specifically configured to:

Receiving, by the mobile node device, the second IP address as the source IP address, and the third IP address as the first session data packet of the destination IP address.

With reference to the first implementation manner, in the second implementation manner of the third aspect, the method further includes:

And a first replacement unit, configured to replace, by the first IP address allocated by the first allocation unit, a second IP address at a source IP address field in the first session data packet received by the first receiving unit.

With reference to the third aspect, in a third implementation manner of the third aspect, the first receiving unit is specifically configured to:

Receiving, by the mobile node device, the first IP address as the source IP address, and the third IP address as the first session data packet of the destination IP address.

In conjunction with the third implementation manner, in a fourth implementation manner of the third aspect, the method further includes: a third receiving unit, configured to receive a router request message sent by the mobile node device, where the router request message has a first flag bit, the first flag bit is a first value, and the first value is used for Representing that the mobile node device will perform the sending of the first session data packet by using the first IP address as a source IP address;

a first binding unit, configured to establish a binding relationship with the communication node by using a proxy binding update message after the third receiving unit receives the router request message, where the proxy binding update message includes the a first flag bit, a first IP address, and a second IP address;

a fourth receiving unit, configured to receive a proxy binding response message sent by the communications node with respect to the proxy binding update message sent by the first binding unit, where the proxy binding response message is used to indicate the communication The node agrees that the mobile node device performs the sending of the first session data packet by using the first IP address as a source IP address.

With reference to the third aspect, any one of the first implementation manner, the second implementation manner, the third implementation manner, and the fourth implementation manner, the fifth implementation manner in the third aspect The first obtaining unit:

Specifically, the method is used to acquire session information of the mobile node device by using a centralized device, where the centralized device is configured to record session information of the mobile node device, where the session information includes an identity identifier of the mobile node device. The second IP address and the third IP address are described.

With reference to the third aspect, any one of the first implementation manner, the second implementation manner, the third implementation manner, and the fourth implementation manner, the sixth implementation in the third aspect In the mode, the first acquiring unit:

Specifically, the session information of the mobile node device is obtained from the second router, where the session information includes an identity identifier of the mobile node device, the second IP address, and a third IP address.

With reference to the third aspect, the first implementation manner, the second implementation manner, the third implementation manner, and the fourth implementation manner, the seventh implementation manner in the third aspect The first obtaining unit:

Specifically, the session information is obtained from the mobile node device, where the session information includes an identity identifier of the mobile node device, the second IP address, and a third IP address.

In a fourth aspect, an embodiment of the present invention provides a mobile node device, including:

a first receiving unit, configured to receive a first IP address allocated by the first router after being attached to the first router;

a first sending unit, configured to send the first session data packet to the first router, so that the first router sends the first session data packet to the communications node by using the first IP address as a source IP address, where And sending, to the communication node, a second IP address of the second router where the mobile node device is located, so that the communication node receives the first session data packet, and the second IP address a final source IP address, and submit the first session data packet and the second IP address to an upper layer of a communication node's IP layer;

a second receiving unit, configured to receive, by the first router, the second IP address a second session packet for the destination IP address; or

And receiving, by the first router, a second session data packet and the second IP address;

a submitting unit, configured to use the second IP address as a final destination IP address, and submit the second session data packet and the second IP address received by the second receiving unit to an IP of the mobile node device The upper layer of the layer.

With reference to the fourth aspect, in a first implementation manner of the fourth aspect, the first sending unit is specifically configured to:

The first session data packet is sent to the first router by using the second IP address as a source IP address and the third IP address as a destination IP address.

With reference to the fourth aspect, in a second implementation manner of the fourth aspect, the first sending unit is specifically configured to:

The first IP address is used as the source IP address, and the third IP address is used as the destination IP address to send the session data packet to the first router.

In conjunction with the second implementation manner, in a third implementation manner of the fourth aspect, the method further includes:

a second sending unit, configured to send a router request message to the first router, where the router request message has a first flag bit, the first flag bit is a first value, and the first value is used to indicate The mobile node device will perform the first IP address as a source IP address. The sending of the first session data packet.

In a fifth aspect, an embodiment of the present invention provides a first router, including:

a first processor, configured to allocate a first IP address to the mobile node device;

a first receiver, configured to acquire a second IP address and a third IP address of the communication node, where the second IP address is allocated by the second router where the mobile node device is located for the mobile node device;

The first receiver is further configured to receive a first session data packet sent by the mobile node device;

a first transmitter, configured to send, by using the first IP address allocated by the first processor, a first session data packet received by the first receiver to the communication node, and the first Sending, by the receiver, a second IP address to the communication node, so that after receiving the first session data packet, the communication node uses the second IP address as a final source IP address, and Transmitting the first session data packet and the second IP address to an upper layer of an IP layer of the communication node;

The first receiver is further configured to receive, by the communication node, a second session data packet with the third IP address as the source IP address and the first IP address as the destination IP address;

The first transmitter is further configured to send the second session data packet received by the first receiver to the mobile node device by directly using the second IP address obtained by the first receiver as a destination IP address. So that the mobile node device, after receiving the second session data packet, Taking the second IP address as a final destination IP address, and submitting the second session data packet and the second IP address to an upper layer of an IP layer of the mobile node device; or

The first transmitter is further configured to send the second session data packet received by the first receiver to the mobile node device, and send the second IP address obtained by the first receiver to The mobile node device, so that after receiving the second session data packet, the mobile node device uses the second IP address as a final destination IP address, and the second session data packet and the The second IP address is delivered to the upper layer of the IP layer of the mobile node device.

With reference to the fifth aspect, in a first implementation manner of the fifth aspect, the first receiver is specifically configured to:

In conjunction with the first implementation, in a second implementation manner of the fifth aspect, the first processor is further configured to:

Replacing the second IP address at the source IP address field in the first session data packet received by the first receiver with the first IP address assigned by the first processor.

With reference to the fifth aspect, in a third implementation manner of the fifth aspect, the first receiver is specifically configured to:

Receiving, by the mobile node device, the first IP address as the source IP address, and the third IP address as the first session data packet of the destination IP address. In conjunction with the third implementation manner, in a fourth implementation manner of the fifth aspect, the first receiver is further configured to:

Receiving a router request message sent by the mobile node device, the router requesting cancellation, with a first flag bit, the first flag bit is a first value, and the first value is used to indicate the mobile node The device will send the first session data packet by using the first IP address as a source IP address;

The first transmitter is further configured to: after the first receiver receives the router request message, establish a binding relationship with the communication node by using a proxy binding update message, where the proxy binding update message is included The first flag bit, the first IP address, and the second IP address;

The first receiver is further configured to receive a proxy binding response message sent by the communications node with respect to a proxy binding update sent by the first sender, where the proxy binding response message is used to indicate The communication node agrees that the mobile node device transmits the session data packet by using the first IP address as a source IP address.

With reference to the fifth aspect, the first implementation manner, the second implementation manner, the third implementation manner, and the fourth implementation manner, the first receiver,

And the method is further configured to acquire session information of the mobile node device by using a centralized device, where the centralized device is configured to record session information of the mobile node device, where the session information includes an identity identifier of the mobile node device. The second IP address and the third IP address are described.

With reference to the fifth aspect, the first implementation manner, the second implementation manner, and the third And the first receiver is further configured to acquire session information of the mobile node device from the second router, where the session information includes the mobile node device The identity flag, the second IP address, and the third IP address.

Also used to obtain session information from the mobile node device, the session information including an identity tag of the mobile node device, the second IP address, and a third IP address.

In a sixth aspect, an embodiment of the present invention provides a mobile node device, including:

a first receiver, configured to receive a first IP address assigned by the first router after being attached to the first router;

a first sender, configured to send the first session data packet to the first router, so that the first router sends the first session data packet to the communication node by using the first IP address as a source IP address, And sending, to the communication node, a second IP address of the second router where the mobile node device is located, so that the communication node receives the first session data packet, and the second IP address a final source IP address, and submit the first session data packet and the second IP address to an upper layer of a communication node's IP layer;

The first receiver is further configured to receive, by the first router, the second session data packet with the second IP address as a destination IP address; or And configured to receive the second session data packet sent by the first router and the second IP address;

a first processor, configured to use the second IP address as a final destination IP address, and submit the second session data packet and the second IP address received by the first receiver to a mobile node device The upper layer of the IP layer.

With reference to the sixth aspect, in a first implementation manner of the sixth aspect, the first transmitter is specifically configured to:

With reference to the sixth aspect, in a second implementation manner of the sixth aspect, the first transmitter is specifically configured to:

The first session data packet is sent to the first router by using the first IP address as a source IP address and the third IP address as a destination IP address.

In conjunction with the second implementation manner, in a third implementation manner of the sixth aspect, the first transmitter is further configured to:

Sending a router request message to the first router, where the router request message has a first flag bit, the first flag bit is a first value, and the first value is used to indicate that the mobile node device is to The first IP address is a source IP address for transmitting the first session data packet. According to a seventh aspect, an embodiment of the present invention provides a session system for distributed mobility management, including a first router, a second router, a mobile node device, and a communication node, where

The first router is configured to allocate a first IP address to the mobile node device, obtain a second IP address, and a third IP address of the communication node, where the second IP address is a second router where the mobile node device is located before And allocating, by the mobile node device, a first session data packet sent by the mobile node device, sending the first session data packet to the communication node by using the first IP address as a source IP address, and The second IP address is sent to the communication node, and the second session data packet with the third IP address as the source IP address and the first IP address as the destination IP address is directly received by the communication node. Transmitting the second session data packet to the mobile node device for a destination IP address, or transmitting the second session data packet to the mobile node device, and transmitting the second IP address to the mobile node The mobile node device is configured to receive a first IP address allocated by the first router, and send a first session data packet to the first router, where Receiving, by the first router, a second session data packet with the second IP address as the destination IP address, or receiving the second session data packet sent by the first router, and the second IP address. Said second IP address is a final destination IP address, and the second session data packet and the second IP address are delivered to an upper layer of an IP layer of the mobile node device;

The communication node is configured to: after receiving the first session data packet sent by the first router, use the second IP address as a final source IP address, and the first session data packet and The second IP address is delivered to the upper layer of the IP layer of the communication node, and the third IP address is used as the source IP address, and the first IP address is used as the destination IP address to send the second session data packet to the first router.

The session method, device and system for distributed mobility management provided by the embodiment of the present invention, after the mobile node device moves to the network where the first router is located, the communication node receives the first session data packet and the mobile node device receives the second When the session data packet is used, the second IP address assigned by the second router to the mobile node device is the final source IP address and the final destination IP address, thereby ensuring that the mobile node device is in the second place before it. The session initiated by the router is not interrupted, and the first IP address assigned by the first router to the mobile node device is the source IP address when the first router sends the first session data packet to the communication node, and the communication node is the first The second session data packet sent by the router uses the first IP address as the destination IP address, so that the first router does not need to establish a communication tunnel when communicating with the communication node. Compared with the prior art, the embodiment of the present invention avoids the application communication tunnel when the mobile node device ensures that the session initiated by the second router where the mobile node is located is not interrupted, thereby saving distributed mobility management. Session cost. DRAWINGS

The drawings used in the embodiments or the description of the prior art are briefly introduced. It is obvious that the drawings in the following description are only some embodiments of the present invention, and are not creative to those skilled in the art. Other drawings can also be obtained from these drawings on the premise of labor. FIG. 1 is a flowchart of a session method for distributed mobility management according to an embodiment of the present invention. 2 is a flowchart of a session method for distributed mobility management according to an embodiment of the present invention.

FIG. 3 is a flowchart of a session method for distributed mobility management according to another embodiment of the present invention; FIG. 4 is a flowchart of a session method for distributed mobility management according to another embodiment of the present invention; FIG. 6 is a schematic structural diagram of a first router according to an embodiment of the present invention; FIG. 7 is a schematic structural diagram of a first router according to another embodiment of the present invention; FIG. 9 is a schematic structural diagram of a mobile node device according to an embodiment of the present invention; FIG. 10 is a schematic structural diagram of a mobile node device according to another embodiment of the present invention; FIG. 11 is a schematic structural diagram of a session system for distributed mobility management according to an embodiment of the present invention.

detailed description

In order to make the advantages of the technical solutions of the present invention more clear, the present invention will be described in detail below with reference to the accompanying drawings and embodiments. As shown in FIG. 1 , a session method for distributed mobility management according to an embodiment of the present invention is described from a first router side, where the method includes: 101. The first router allocates a first IP address to the mobile node device.

102. The first router acquires a second IP address and a third IP address of the communication node. The second IP address is allocated by the second router where the mobile node device is located for the mobile node device.

The first router may acquire session information of the mobile node device by using a centralized device, where the centralized device is configured to record session information of the mobile node device, for example, the centralized device stores a policy profile of the mobile node device, where the session information of the mobile node device is recorded in the configuration information, and the session information includes a mobile node identity (Mobile Node Identity, MN-ID for short) ), the second IP address and the third IP address.

Alternatively, the first router may acquire session information of the mobile node device by using the second router, where the session information includes an identity identifier of the mobile node device, the second IP address, and a third IP address. . In addition, after the first router acquires the mobile node device session information from the second router, the second router may delete session information of the mobile node device to save storage space of the second router.

Or the first router acquires session information from the mobile node device, for example, the mobile node device stores configuration information (the policy profile) of the mobile node device, where the mobile node is recorded in the configuration information. Session information of the device, the session information including an identity flag of the mobile node device, the second IP address, and a third IP address. Alternatively, the acquiring, by the first router, the session information from the mobile node device may also be implemented by receiving a data packet that is sent by the mobile node device and carrying the session information, where the session information includes the mobile node device. The second IP address and the third IP address.

103. The first router receives a first session data packet sent by the mobile node device. The mobile node device may use the first IP address or the second IP address as a source.

The IP address is used to send the first session packet. If the mobile node device sends the first session data packet with the first IP address as the source IP address, the second IP address may be the home address option of the first session data packet IP header (Home) Address Option ) Carry.

The first router sends the first session data packet to the communication node by using the first IP address as a source IP address, and sends the second IP address to the communication node, so that the first router After receiving the session data packet, the communication node uses the second IP address as the final source IP address, and delivers the first session data packet and the second IP address to the IP layer of the communication node. Upper level.

105. The first router receives the second session data packet with the third IP address as the source IP address and the first IP address as the destination IP address. Then step 106 or step 107 is performed.

The second IP address is carried by a Type 2 Routing Header in an IP header of the second session data packet. 106. The first router directly sends the second session data packet to the mobile node device by using a second IP address as a destination IP address, so that the mobile node device receives the second session data packet. Thereafter, the second IP address is used as the final destination IP address, and the second session data packet and the second IP address are delivered to an upper layer of the IP layer of the mobile node device.

After receiving the second session data packet, the first router replaces the first IP address in the IP header with the second IP address in the Type 2 Routing Header, so that the second The IP address is used as the destination IP address.

107. The first router sends a second session data packet to the mobile node device, and sends the second IP address to the mobile node device, so that the mobile node device receives the second After the session data packet, the second IP address is the final destination IP address, and the second session data packet and the second IP address are delivered to an upper layer of the IP layer of the mobile node device.

The first router directly forwards the second session data packet, and the second IP address is carried by a Type 2 Routing Header in an IP header of the second session data packet.

As shown in FIG. 2, the session method for distributed mobility management according to the embodiment of the present invention is described from the mobile node device side, and the method includes:

201. After attaching to the first router, the mobile node device receives the first IP address allocated by the first router. 202. The mobile node device sends a first session data packet to the first router, so that the first router sends the first session data packet to the communication node by using the first IP address as a source IP address. And transmitting, to the communication node, a second IP address assigned by the second router where the mobile node device is located, so that the communication node receives the first session data packet, and the second IP address The address is the final source IP address, and the first session data packet and the second IP address are delivered to the upper layer of the IP layer of the communication node. Then step 203 or step 204 is performed.

203. The mobile node device receives, by the first router, a second session data packet with the second IP address as a destination IP address.

204. The mobile node device receives a second session data packet sent by the first router and the second IP address.

205. After receiving the second session data packet, the mobile node device uses the second IP address as a final destination IP address, and submits the second session data packet and the second IP address. Go to the upper layer of the IP layer of the mobile node device.

It should be noted that the first router and the second router provided by the embodiments of the present invention are generally first-hop access routers (ARs), which can be used as mobile anchor points to perform mobility management functions. .

The session method for distributed mobility management provided by the embodiment of the present invention, when the communication node receives the first session data packet and the mobile node device receives the second session data packet, respectively, the second path The second IP address assigned by the router to the mobile node device is the final source IP address and the final destination IP address, thereby ensuring that the session initiated by the mobile node device at the second router where it is located is not interrupted. And when the first router sends the first session data packet to the communication node, the first IP address assigned by the first router to the mobile node device is the source IP address, and the second session data packet sent by the communication node to the first router is The first IP address is used as the destination IP address, so that the first router does not need to establish a communication tunnel when communicating with the communication node. Compared with the prior art, the embodiment of the present invention avoids the application communication tunnel when the mobile node device ensures that the session initiated by the second router where the mobile node is located is not interrupted, thereby saving distributed mobility management. Session cost.

As shown in FIG. 3, a session method for distributed mobility management according to another embodiment of the present invention includes:

301. A mobile node (Mobile Node, MN for short) device initiates a session on the second router, and sends a first session data packet to the communication node by using the second IP address assigned by the second router as the source IP address.

302. The mobile node device moves to a network of the first router. After the mobile node device is attached to the first router, the first router allocates a first IP address to the mobile node device.

303. The mobile node device sends a router request message to the first router. The router request (Router Solicitation, referred to as RS) message is carried in the message Having a first flag, if the first flag is a first value (eg, using a binary number 1), the first value is used to indicate that the mobile node device will use the first IP address as a source IP address The first session data packet is sent. If the first flag is a second value (for example, using a binary 0), the second value is used to indicate that the mobile node device will perform the first session data packet with the second IP address as the source IP address. send.

304. The first router acquires a second IP address and a third IP address of the communication node. The second IP address is allocated by the second router where the mobile node device is located for the mobile node device.

Alternatively, the first router may acquire session information of the mobile node device by using the second router, where the session information includes an identity identifier of the mobile node device, the second IP address, and a third IP address. . In addition, after the first router acquires the mobile node device session information from the second router, the second router may delete session information of the mobile node device to save storage space of the second router. Or the first router acquires session information from the mobile node device, for example, the mobile node device stores configuration information (the policy profile) of the mobile node device, where the mobile node is recorded in the configuration information. Session information of the device, the session information including an identity flag of the mobile node device, the second IP address, and a third IP address.

Alternatively, the acquiring, by the first router, the session information from the mobile node device may also be implemented by receiving a data packet that is sent by the mobile node device and carrying the session information, where the session information includes the mobile node device. The second IP address and the third IP address.

305. The first router establishes a binding relationship with the communication node by using a Proxy Binding Update (PBU) message, where the proxy binding update message carries the first flag bit, and the first IP address and second IP address.

The first flag bit in the PBU message is a first value (for example, using a binary number 1), and indicates that the mobile node device sends the first session data packet by using the first IP address as a source IP address. To maintain the continuity of the session initiated on the second router. The first

The IP address can be recorded in a pre-defined current address mobility option (MN Current-Address Mobility Opt ion) in the mobile node device, for example, the format of the Current-Address Mobility Opt ion is as shown in Table 1, where Type represents The type of option (value is an integer, for example defined as 7), Length indicates the length of MN Current-Address (value is 16, the unit is sub-section), MN Current-Address indicates the value of the option is the value of the current address move option And the second IP address can be recorded in The Home Address Option in the IP header of the PBU message Table 1. Format of the MN Current-Address Mobility Option option:

306. After receiving the proxy binding update message, the communications node can satisfy the requirement that the mobile node device sends the first session data packet by using the first IP address as a source IP address. And returning a Proxy Binding Acknowledgement (PBA) message to the first router with respect to the proxy binding update message.

The PBA message carries the first flag bit, and the first flag bit in the PBA message is a first value (for example, using a binary number 1), and is used to indicate that the communication node agrees to the mobile node. The device sends the first session data packet by using the first IP address as the source IP address.

The communication node must maintain the first session data packet when the communication node receives the proxy binding update message and agrees that the mobile node device sends the first session data packet with the first IP address as the source IP address. A binding list, the binding list includes at least a mobile node identity (Mobile Node Identity, MN_ID), the first flag bit, a home address (HoA), and a current address. The first flag bit in the binding list is a first value (for example, a binary number 1 is used), and the second router where the home address is the mobile node device is the mobile node device. The assigned second IP address, where the current address is a first IP address assigned by the first router where the mobile node device is located to the mobile node device.

Specifically, the communication node determines whether it can meet the requirement of the mobile node device to send the first session data packet by using the first IP address as a source IP address, where the communication node is If the security of the mobile node device is not perfect, the communication node does not accept the request of the mobile node device to send the first session data packet by using the first IP address as the source IP address, in order to ensure And establishing, by the mobile node device, the security of the session initiated by the second router, establishing a communication tunnel between the network where the second router is located and the network where the first router is located, or at the communication node The communication tunnel is established between the networks where the first router is located, but is not limited thereto.

307. The first router receives a proxy binding response message sent by the communications node, and instructs the mobile node device to send the first session data packet by using the first IP address as a source IP address.

The first router may send a Router Advertisement (RA) message to the mobile node device, and notify the mobile node device to send the first session data packet by using the first IP address as a source IP address. The router advertisement message carries a first flag bit, the first flag bit is a first value (for example, using a binary number 1), and the first value is used to indicate that the mobile node device is to be the first The IP address is the source IP address for sending the first session data packet. If the first flag bit in the router request message in step 303 is a second value (for example, using a binary number 0), the first flag bit in the Router Advertisement (RA) message a second value (for example, using a binary number of 0), and the first router must maintain a binding list, the binding list including at least a mobile node identity (Mobile Node Identity, MN-ID), A flag, Home Address (HoA), previous address.

The first flag bit in the binding list is a second value (for example, using a binary number 0), and the home address is the first router that the mobile node device is currently located to allocate to the mobile node device. An IP address, the previous address being a second IP address assigned by the second router where the mobile node device was located to the mobile node device.

308. The mobile node device sends the first session data packet to the first router by using the first IP address as a source IP address and the third IP address as a destination IP address.

The first session data packet carries a second IP address assigned by the second router where the mobile node device is located to the mobile node device, and the second IP address may be used by the first session data packet. The IP header's Home Address Option is carried.

309. The first router sends a first session data packet to the communication node by using the first IP address as a source IP address, and sends the second IP address to the communication node.

After receiving the first session data packet, the communication node uses the second IP address as a final source IP address, and hands the first session data packet and the second IP address. Go to the upper layer of the IP layer of the communication node.

311. The communication node sends the second session data packet to the first router by using the third IP address as the source IP address and the IP address for the first IP address.

The second IP address is carried by the Type 2 Routing Header of the IP header of the second session data packet.

312. After receiving the second session data packet, the first router sends a second session data packet to the mobile node device by using the first IP address as the destination IP address, and sends the second IP address. To the mobile node device.

313. After receiving the second session data packet, the mobile node device uses the second IP address as a final destination IP address, and submits the second session data packet and the second IP address. Go to the upper layer of the IP layer of the mobile node device.

A session method for distributed mobility management according to another embodiment of the present invention, when the communication node receives the first session data packet and the mobile node device receives the second session data packet, respectively, the second router is allocated to the mobile node device. The second IP address is the final source IP address and the final destination IP address, thereby ensuring that the session initiated by the mobile node device at the second router where it is located is not interrupted, and because the first router sends the communication to the communication node. The first session data packet is configured with the first IP address assigned by the first router as the mobile node device as the source IP address, and the second session data packet sent by the communication node to the first router is for the first IP address. IP address, so that the first router does not need to be built when communicating with the communication node Establish a communication tunnel. Compared with the prior art, the embodiment of the present invention avoids the application communication tunnel when the mobile node device ensures that the session initiated by the second router where the mobile node is located is not interrupted, thereby saving distributed mobility management. Session cost.

As shown in FIG. 4, a session method for distributed mobility management according to another embodiment of the present invention includes:

401. The mobile node (Mobile Node, MN for short) device initiates a session on the second router, and sends the first session data packet to the communication node by using the second IP address assigned by the second router as the source IP address.

402. The mobile node device moves to a network of the first router. After the mobile node device is attached to the first router, the first router allocates a first IP address to the mobile node device.

403. The mobile node device sends the first session data packet to the first router by using the second IP address as a source IP address and the third IP address as a destination IP address.

404. After receiving the first session data packet, the first router replaces the second IP address in the source IP address field in the first session data packet with the first IP address.

405. The first router sends a first session data packet to the communication node by using the first IP address as a source IP address, and sends the second IP address to the communication node.

The second IP address is carried by a Home Address Option in an IP header of the first session data packet. 406. After receiving the first session data packet, the communications node uses the second IP address as a final source IP address, and submits the first session data packet and the second IP address to The upper layer of the IP layer of the communication node.

407. The communication node sends the second session data packet to the first router by using the third IP address as the source IP address and the first IP address as the destination IP address.

The second session data packet carries a second IP address assigned by the second router where the mobile node device is located to the mobile node device, and the second IP address is used by the second session data packet. The Type 2 Routing Header in the IP header is carried.

408. After receiving the second session data packet, the first router replaces the first IP address in the source IP address field in the second session data packet with the second IP address.

409. The first router directly sends the second session data packet to the mobile node device by using a second IP address as a destination IP address.

410. After receiving the second session data packet, the mobile node device uses the second IP address as a final destination IP address, and submits the second session data packet and the second IP address. Go to the upper layer of the IP layer of the mobile node device.

A session method for distributed mobility management according to another embodiment of the present invention, when the communication node receives the first session data packet and the mobile node device receives the second session data packet, respectively, the second router is allocated to the mobile node device. The second IP address is the final source IP address and most End destination IP address, thereby ensuring that the session initiated by the mobile node device at the second router where it is located is not interrupted, and the first router is the first router when sending the first session data packet to the communication node The first IP address assigned to the mobile node device is the source IP address, and the second session data packet sent by the communication node to the first router uses the first IP address as the destination IP address, thereby causing the first router and the There is no need to establish a communication tunnel when the communication node communicates. Compared with the prior art, the embodiment of the present invention avoids the application communication tunnel when the mobile node device ensures that the session initiated by the second router where the mobile node is located is not interrupted, thereby saving distributed mobility management. Session cost.

As shown in FIG. 5, the first router provided by the embodiment of the present invention includes:

The first allocating unit 501 is configured to allocate a first IP address to the mobile node device. For details, see step 101 in Figure 1, and no further details are provided here.

The first obtaining unit 502 is configured to acquire a second IP address and a third IP address of the communication node, where the second IP address is allocated by the second router where the mobile node device is located for the mobile node device. For the specific implementation, refer to step 102 in Figure 1, and no further details are provided here.

The first receiving unit 503 is configured to receive the first session data packet sent by the mobile node device. For the specific implementation, refer to step 103 in Figure 1, and details are not described here.

The first sending unit 504 is configured to send, by using the first IP address that is allocated by the first allocating unit 501 as a source IP address, the first received by the first receiving unit 503 to the communications node. a session data packet, and sending the second IP address obtained by the first obtaining unit 502 to the communication node, so that after receiving the first session data packet, the communication node uses the second IP The address is the final source IP address, and the first session data packet and the second IP address are delivered to the upper layer of the IP layer of the communication node. For the specific implementation, refer to step 104 in Figure 1, and details are not described herein.

The second receiving unit 505 is configured to receive, by the communications node, a second session data packet with the third IP address as the source IP address and the first IP address as the destination IP address. The specific implementation manner is shown in step 105 in Figure 1, and will not be described here.

The first sending unit 504 is further configured to send, by using the second IP address obtained by the first acquiring unit 502 as the destination IP address, the second session data packet received by the second receiving unit 505 to the Moving the node device, so that after receiving the second session data packet, the mobile node device uses the second IP address as a final destination IP address, and the second session data packet and the first The two IP addresses are delivered to the upper layer of the IP layer of the mobile node device. For details, see step 106 in Figure 1, and no further details are provided here.

Or the first sending unit 504 is further configured to send, by the first router, the second session data packet received by the second receiving unit 505 to the mobile node device, and the first acquiring unit 502 Obtaining the second IP address to be sent to the mobile node device, so that after receiving the second session data packet, the mobile node device uses the second IP address as a final destination IP address, and Transmitting the second session data packet and the second IP address to The upper layer of the IP layer of the mobile node device. For the specific implementation, refer to step 107 in Figure 1, and details are not described here.

Further, as shown in FIG. 6, the first receiving unit 503 is specifically configured to: receive, by the mobile node device, the second IP address as a source IP address, and the third

The IP address is the first session packet of the destination IP address. For details, refer to step 403 in Figure 4, and details are not described here.

Further, as shown in FIG. 6, the first router further includes:

a first replacing unit 506, configured to replace, by using the first IP address allocated by the first allocating unit 501, a second IP address at a source IP address field in the first session data packet received by the first receiving unit 503 . For details, refer to step 404 in Figure 4, and details are not described here.

Further, as shown in FIG. 6, the first receiving unit 503 is specifically configured to: receive, by the mobile node device, the first IP address as a source IP address, and the third

The IP address is the first session packet of the destination IP address. For details, refer to step 308 in Figure 3, and details are not described herein.

Further, as shown in FIG. 6, the first router further includes:

The third receiving unit 507 is configured to receive a router request message sent by the mobile node device, where the router request message has a first flag bit, the first flag bit is a first value, and the first value is used by Representing that the mobile node device will use the first IP address as the source IP The address performs the transmission of the first session data packet. See the steps in Figure 3 for the specific implementation.

As shown in 303, it will not be described here.

The first binding unit 508 is configured to establish, after the third receiving unit 507 receives the router request message, a binding relationship with the communication node by using a proxy binding update message, where the proxy binding update message is included The first flag bit, the first IP address, and the second IP address. For the specific implementation, refer to step 305 in Figure 3, and details are not described herein.

a fourth receiving unit 509, configured to receive a proxy binding response message sent by the communications node with respect to the proxy binding update message sent by the first binding unit 508, where the proxy binding response message is used to indicate The communication node agrees that the mobile node device performs the sending of the first session data packet by using the first IP address as a source IP address. For the specific implementation, refer to step 306 in Figure 3, and details are not described herein.

Further, as shown in FIG. 6, the first acquiring unit 502:

Specifically, the method is used to acquire session information of the mobile node device by using a centralized device, where the centralized device is configured to record session information of the mobile node device, where the session information includes an identity identifier of the mobile node device. The second IP address and the third IP address are described. For details, refer to step 304 in Figure 3, and details are not described here.

Or, as shown in FIG. 6, the first acquiring unit 502:

Specifically, the method is configured to acquire session information of the mobile node device from the second router, where the session information includes an identity identifier of the mobile node device, the second IP address, and a third IP address. For the specific implementation, refer to step 304 in Figure 3, and details are not described herein. Or, as shown in FIG. 6, the first acquiring unit 502:

Specifically, the session information is obtained from the mobile node device, where the session information includes an identity identifier of the mobile node device, the second IP address, and a third IP address. For details, refer to step 304 in Figure 3, and details are not described here.

The first router provided by the embodiment of the present invention, when the communication node receives the first session data packet and the mobile node device receives the second session data packet, respectively, is allocated by the second router as the mobile node device. The second IP address is the final source IP address and the final destination IP address, thereby ensuring that the session initiated by the mobile node device at the second router where it is located is not interrupted, and because the first router sends the first node to the communication node. The first IP address assigned by the first router to the mobile node device is the source IP address, and the second session data packet sent by the communication node to the first router uses the first IP address as the destination IP address. An address such that the first router does not need to establish a communication tunnel when communicating with the communication node. Compared with the prior art, the embodiment of the present invention avoids the application communication tunnel when the mobile node device ensures that the session initiated by the second router where the mobile node is located is not interrupted, thereby saving distributed mobility management. Session cost. As shown in FIG. 7, a first router according to another embodiment of the present invention includes: a first processor 61, configured to allocate a first IP address to a mobile node device. For the specific implementation, refer to step 101 in Figure 1, and details are not described herein.

The first receiver 62 is configured to acquire a second IP address and a third IP address of the communication node, where the second IP address is allocated by the second router where the mobile node device is located for the mobile node device. For the specific implementation, refer to step 102 in Figure 1, and no further details are provided here.

The first receiver 62 is further configured to receive a first session data packet sent by the mobile node device. For the specific implementation, refer to step 103 in Figure 1, and details are not described here.

a first transmitter 63, configured to send, by using the first IP address allocated by the first processor 61, a first session data packet to the communication node, and send the second IP address to the a communication node, such that after receiving the first session data packet, the communication node uses the second IP address as a final source IP address, and the first session data packet and the second IP address The address is delivered to the upper layer of the IP layer of the communication node. For the specific implementation, refer to step 104 in Figure 1, and details are not described here.

The first receiver 62 is further configured to receive, by the communication node, a second session data packet with the third IP address as the source IP address and the first IP address as the destination IP address. The specific implementation is shown in step 105 in Figure 1, and is not described here.

The first transmitter 63 is further configured to directly use the second IP address as the destination IP address. Transmitting, by the first receiver 62, the second session data packet to the mobile node device, so that after receiving the second session data packet, the mobile node device uses the second IP address as a final The destination IP address, and the second session data packet and the second IP address are delivered to an upper layer of the IP layer of the mobile node device. For the specific implementation, refer to step 106 in Figure 1, and details are not described here.

Or the first transmitter 63 is further configured to send, by the first router, the second session data packet received by the first receiver 62 to the mobile node device, and send the second IP address to the Moving the node device, so that after receiving the second session data packet, the mobile node device uses the second IP address as a final destination IP address, and the second session data packet and the first The two IP addresses are delivered to the upper layer of the IP layer of the mobile node device. For the specific implementation, refer to step 107 in Figure 1, and details are not described here.

Further, as shown in FIG. 7, the first receiver 62 is specifically configured to:

Receiving, by the mobile node device, the second IP address as a source IP address, and the third IP address as a first session data packet of a destination IP address. For details, refer to step 403 in Figure 4, and details are not described here.

Further, as shown in FIG. 7, the first processor 61,

Also for replacing the second IP address at the source IP address field in the first session data packet with the first IP address. For the specific implementation, refer to step 404 in Figure 4, where not Further, as shown in FIG. 7, the first receiver 62 is specifically configured to: receive, by the mobile node device, the first IP address as a source IP address, and the third

Further, as shown in FIG. 7, the first receiver 62,

And a router request message sent by the mobile node device, where the router request message has a first flag bit, the first flag bit is a first value, and the first value is used to indicate the mobile The node device will perform the sending of the first session data packet with the first IP address as the source IP address. For the specific implementation, refer to step 303 in Figure 3, and details are not described herein.

The first transmitter 63 is further configured to establish a binding relationship with the communication node by using a proxy binding update message, where the proxy binding update message carries the first flag bit, the first IP address, and the first Two IP addresses. For details, refer to step 305 in Figure 3, and details are not described here.

The first receiver 62 is further configured to receive a proxy binding response message sent by the communications node with respect to the proxy binding update message, where the proxy binding response message is used to indicate that the communications node agrees to The mobile node device transmits the session data packet by using the first IP address as the source IP address. For the specific implementation, refer to step 306 in Figure 3, and details are not described herein. Further, as shown in FIG. 7, the first receiver 62,

And the method is further configured to acquire session information of the mobile node device by using a centralized device, where the centralized device is configured to record session information of the mobile node device, where the session information includes an identity identifier of the mobile node device. The second IP address and the third IP address are described. For the specific implementation, refer to step 304 in Figure 3, and details are not described here.

Further, as shown in FIG. 7, the first receiver 62,

And the method is further configured to acquire session information of the mobile node device from the second router, where the session information includes an identity identifier of the mobile node device, the second IP address, and a third IP address. For the specific implementation, refer to step 304 in Figure 3, and details are not described herein.

Further, as shown in FIG. 7, the first receiver 62,

Also used to obtain session information from the mobile node device, the session information including an identity flag of the mobile node device, the second IP address, and a third IP address. For the specific implementation, refer to step 304 in Figure 3, and details are not described here.

According to still another embodiment of the present invention, when the communication node receives the first session data packet and the mobile node device receives the second session data packet, the second router is the mobile node device. The assigned second IP address is the final source IP address and the final destination IP address, thereby ensuring that the session initiated by the mobile node device at the second router where it is located is not interrupted, and because the first router is to the communication node The first IP address assigned by the first router to the mobile node device when the first session data packet is sent is the source IP address, and The second session data packet sent by the communication node to the first router uses the first IP address as the destination IP address, so that the first router does not need to establish a communication tunnel when communicating with the communication node. Compared with the prior art, the embodiment of the present invention avoids the application communication tunnel when the mobile node device ensures that the session initiated by the second router where the mobile node is located is not interrupted, thereby saving distributed mobility management. Session cost.

As shown in FIG. 8, the mobile node device provided by the embodiment of the present invention includes:

The first receiving unit 71 is configured to receive the first IP address allocated by the first router after being attached to the first router. For details, refer to step 201 in Figure 2, and details are not described here.

The first sending unit 72 is configured to send the first session data packet to the first router, so that the first router sends the first session data packet to the communication node by using the first IP address as a source IP address. Transmitting, to the communication node, a second IP address of the second router where the mobile node device is located, and then causing the communication node to use the second IP after receiving the first session data packet The address is the final source IP address, and the first session data packet and the second IP address are delivered to the upper layer of the IP layer of the communication node. For details, refer to step 202 in Figure 2, and details are not described here.

The second receiving unit 73 is configured to receive the second session data packet that is sent by the first router by using the second IP address as a destination IP address, or to receive the first Two session data packets and the second IP address. See the specific implementation Step 203 and step 204 are shown in FIG. 2, and details are not described herein again.

The submitting unit 74 is configured to use the second IP address as the final destination IP address, and submit the second session data packet and the second IP address received by the second receiving unit 73 to the mobile node device. The upper layer of the IP layer. For the specific implementation, refer to step 205 in Figure 2, and the details are not described here.

Further, as shown in FIG. 9, the first sending unit 72 is specifically configured to:

The first session data packet is sent to the first router by using the second IP address as a source IP address and the third IP address as a destination IP address. For details, refer to step 403 in Figure 4, and details are not described here.

The first session data packet is sent to the first router by using the first IP address as a source IP address and the third IP address as a destination IP address. For the specific implementation, refer to step 308 in Figure 3, and details are not described herein.

Further, as shown in FIG. 9, the mobile node device further includes:

a second sending unit 75, configured to send a router request message to the first router, where the router request message carries a first flag, the first flag is a first value, and the first value is used Representing that the mobile node device will transmit the first session data packet with the first IP address as a source IP address. For the specific implementation, refer to step 303 in Figure 3. It should be noted that the mobile node device provided by the embodiment of the present invention may be a mobile phone, a mobile phone, or the like, but is not limited thereto.

The mobile node device provided by the embodiment of the present invention, when the communication node receives the first session data packet and the mobile node device receives the second session data packet, respectively, the second IP address assigned by the second router to the mobile node device is the final Source IP address and final destination IP address, thereby ensuring that the mobile node device does not interrupt the session initiated by the second router where it is located, and because the first router sends the first session data packet to the communication node, The first IP address assigned by the first router to the mobile node device is a source IP address, and the second session data packet sent by the communication node to the first router uses the first IP address as the destination IP address, thereby causing the The first router does not need to establish a communication tunnel when communicating with the communication node. Compared with the prior art, the embodiment of the present invention avoids the application communication tunnel when the mobile node device ensures that the session initiated by the second router where the mobile node is located is not interrupted, thereby saving distributed mobility management. Session cost.

As shown in FIG. 10, a mobile node device according to another embodiment of the present invention includes: a first receiver 81, configured to receive a first IP address allocated by the first router after being attached to the first router. . For details, refer to step 201 in Figure 2, and details are not described here.

The first transmitter 82 is configured to send the first session data packet to the first router, so that the first router sends the first node to the communication node by using the first IP address as a source IP address. a session data packet, and sending a second IP address of the second router where the mobile node device is located to the communication node, so that after receiving the first session data packet, the communication node The second IP address is the final source IP address, and the first session data packet and the second IP address are delivered to an upper layer of the IP layer of the communication node. For the specific implementation, refer to step 202 in Figure 2, and details are not described herein.

The first receiver 81 is further configured to receive the second session data packet that is sent by the first router by using the second IP address as a destination IP address, or to receive the a second session data packet and the second IP address. For details, refer to steps 203 and 204 in Figure 2, and details are not described here.

The first processor 83 is configured to use the second IP address as a final destination IP address, and submit the second session data packet and the second IP address received by the first receiver 81 to the mobile node device. The upper layer of the IP layer. For details, refer to step 205 in Figure 2, and details are not described here.

Further, as shown in FIG. 10, the first transmitter 82 is specifically configured to:

Taking the first IP address as the source IP address and the third IP address as the destination IP address Sending the first session data packet to the first router. For the specific implementation, refer to step 308 in Figure 3, and details are not described herein.

Further, as shown in FIG. 10, the first transmitter 82 is further configured to:

Sending a router request message to the first router, where the router request message has a first flag bit, the first flag bit is a first value, and the first value is used to indicate that the mobile node device is to The first IP address is a source IP address for transmitting the first session data packet. For the specific implementation, refer to step 303 in Figure 3, and details are not described herein.

It should be noted that the mobile node device provided by the embodiment of the present invention may be a mobile phone, a mobile phone, or the like, but is not limited thereto.

According to still another embodiment of the present invention, when the communication node receives the first session data packet and the mobile node device receives the second session data packet, the second IP address assigned by the second router to the mobile node device is respectively The final source IP address and the final destination IP address, thereby ensuring that the session initiated by the mobile node device at the second router where it is located is not interrupted, and because the first router sends the first session data packet to the communication node. The first IP address assigned by the first router to the mobile node device is the source IP address, and the second session data packet sent by the communication node to the first router uses the first IP address as the destination IP address, thereby The first router does not need to establish a communication tunnel when communicating with the communication node. Compared with the prior art, the embodiment of the present invention ensures that the mobile node device avoids the application communication tunnel in the case that the session initiated by the second router where the mobile node is located is not interrupted, thereby saving the distribution. Session cost for mobility management.

As shown in FIG. 11, the session system for distributed mobility management according to the embodiment of the present invention includes the first router 91, the second router 92, the mobile node device 93, and the communication node 94.

The first router 91 is configured to allocate a first IP address to the mobile node device 93, obtain a second IP address, and a third IP address of the communication node 94, where the second IP address is the previous location of the mobile node device 93. The second router 92 is allocated to the mobile node device 93, receives the first session data packet sent by the mobile node device 93, and sends the first session to the communication node 94 with the first IP address as the source IP address. a session data packet, and sending the second IP address to the communication node 94, and receiving the second session data of the communication node 94 with the third IP address as the source IP address and the first IP address as the destination IP address. Transmitting, by using the second IP address as the destination IP address, the second session data packet to the mobile node device 93, or sending the second session data packet to the mobile node device 93, and The second IP address is sent to the mobile node device 93.

The mobile node device 93 is configured to receive a first IP address allocated by the first router 91, send a first session data packet to the first router 91, and receive, by the first router 91, the first IP address. The second session data packet whose IP address is the destination IP address, or the second session data packet sent by the first router 91 and the second IP address, with the second IP address as the final purpose IP address and the second session packet and The second IP address is delivered to the upper layer of the IP layer of the mobile node device 93.

The communication node 94 is configured to: after receiving the first session data packet sent by the first router 91, use the second IP address as a final source IP address, and the first session data packet and The second IP address is delivered to the upper layer of the IP layer of the communication node 94, and the third IP address is used as the source IP address, and the first IP address is used as the destination IP address to send the second session data packet to the first router 91.

For a specific implementation manner, refer to the foregoing specific embodiments of the first router and the mobile node device, and details are not described herein again.

The distributed mobility management session system provided by the embodiment of the present invention allocates the first session data packet and the mobile node device receives the second session data packet by using the second router as the mobile node device. The second IP address is the final source IP address and the final destination IP address, thereby ensuring that the session initiated by the mobile node device at the second router where it is located is not interrupted, and because the first router sends the communication to the communication node. The first session data packet is configured with the first IP address assigned by the first router as the mobile node device as the source IP address, and the second session data packet sent by the communication node to the first router is for the first IP address. The IP address, such that the first router does not need to establish a communication tunnel when communicating with the communication node. Compared with the prior art, the embodiment of the present invention avoids the application communication tunnel when the mobile node device ensures that the session initiated by the second router where the mobile node is located is not interrupted, thereby saving distributed mobility management. Session cost. Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented by means of software plus necessary general hardware, and of course, by hardware, but in many cases, the former is a better implementation. . Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a readable storage medium, such as a floppy disk of a computer. A hard disk or optical disk or the like includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform the methods described in various embodiments of the present invention.

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

claims

1. A session method for distributed mobility management, characterized in that it includes: the first router allocates a first IP address to the mobile node device;

The first router obtains a second IP address and a third IP address of the communication node, wherein the second IP address is assigned to the mobile node device by the second router where the mobile node device was previously located;

The first router receives the first session data packet sent by the mobile node device; the first router sends the first session data packet to the communication node using the first IP address as the source IP address, and Send the second IP address to the communication node, so that after receiving the first session data packet, the communication node uses the second IP address as the final source IP address, and sends the The first session data packet and the second IP address are submitted to an upper layer of the IP layer of the communication node;

The first router receives the second session data packet of the communication node with the third IP address as the source IP address and the first IP address as the destination IP address;

The first router directly sends the second session data packet to the mobile node device using the second IP address as the destination IP address, so that after the mobile node device receives the second session data packet, Using the second IP address as the final destination IP address, and submitting the second session data packet and the second IP address to the upper layer of the IP layer of the mobile node device; or The first router sends a second session data packet to the mobile node device, and sends the second IP address to the mobile node device, so that the mobile node device receives the second session data After receiving the packet, the second IP address is used as the final destination IP address, and the second session data packet and the second IP address are submitted to the upper layer of the IP layer of the mobile node device.

2. The method according to claim 1, wherein the first router receives the first session data packet sent by the mobile node device, including:

The first router receives the first session data packet in which the mobile node device uses the second IP address as the source IP address and the third IP address as the destination IP address.

3. The method according to claim 2, characterized in that, before the first router sends the first session data packet to the communication node using the first IP address as the source IP address, it includes:

The first router replaces the second IP address at the source IP address field in the first session packet with the first IP address.

4. The method according to claim 1, wherein the first router receives the first session data packet sent by the mobile node device, including:

The first router receives the first session data packet in which the mobile node device uses the first IP address as the source IP address and the third IP address as the destination IP address.

5. The method according to claim 4, characterized in that: receiving at the first router Before the first session data packet in which the mobile node device uses the first IP address as the source IP address and the third IP address as the destination IP address, it includes:

The first router receives the router request message sent by the mobile node device, the router request message carries a first flag bit, the first flag bit is a first value, and the first value is used to represent the The mobile node device will use the first IP address as the source IP address to send the first session data packet;

The first router establishes a binding relationship with the communication node through a proxy binding update message, and the proxy binding update message carries the first flag, the first IP address and the second IP address;

The first router receives a proxy binding response message sent by the communication node relative to the proxy binding update message, and the proxy binding response message is used to indicate that the communication node agrees with the mobile node device in the The first IP address is the source IP address for sending the first session data packet.

6. The method according to any one of claims 1 to 5, characterized in that the first router obtains the second IP address and the third IP address of the communication node, including:

The first router obtains the session information of the mobile node device through a centralized device. The centralized device is used to record the session information of the mobile node device. The session information includes the identity mark of the mobile node device. , the second IP address and the third IP address.

7. The method according to any one of claims 1 to 5, characterized in that, the first route The server obtains the second IP address and the third IP address of the communication node, including:

The first router obtains the session information of the mobile node device from the second router, and the session information includes the identity flag of the mobile node device, the second IP address, and the third IP address.

8. The method according to any one of claims 1 to 5, characterized in that the first router obtains the second IP address and the third IP address of the communication node, including:

The first router obtains session information from the mobile node device, and the session information includes the identity flag of the mobile node device, the second IP address, and the third IP address.

9. A session method for distributed mobility management, characterized by including:

After the mobile node device is attached to the first router, it receives the first IP address assigned by the first router;

The mobile node device sends a first session data packet to the first router, so that the first router uses the first IP address as the source IP address to send the first session data packet to the communication node, and The second IP address of the second router where the mobile node device was previously located is sent to the communication node, so that after receiving the first session data packet, the communication node uses the second IP address as the final the source IP address, and submit the first session data packet and the second IP address to the upper layer of the IP layer of the communication node;

The mobile node device receives a second session data packet sent by the first router with the second IP address as the destination IP address; or The mobile node device receives the second session data packet and the second IP address sent by the first router;

After receiving the second session data packet, the mobile node device uses the second IP address as the final destination IP address, and submits the second session data packet and the second IP address to the mobile node device. The upper layer of the IP layer of the node device.

10. The method according to claim 9, wherein the mobile node device sends a first session data packet to the first router, including:

The mobile node device uses the second IP address as the source IP address and the third IP address as the destination IP address to send the first session data packet to the first router.

11. The method according to claim 9, wherein the mobile node device sends a first session data packet to the first router, including:

The mobile node device uses the first IP address as the source IP address and uses the third IP address as the destination IP address to send the first session data packet to the first router.

12. The method according to claim 11, characterized in that, in the mobile node device, the first IP address is used as the source IP address, and the third IP address is used as the destination IP address to send data to the first router. Before sending the first session data packet, include:

The mobile node device sends a router request message to the first router, the router request message carries a first flag bit, the first flag bit is a first value, and the first value is used to represent the The mobile node device will use the first IP address as the source IP address to perform the Sending of the first session packet.

1 3. A first router, characterized in that it includes:

A first allocation unit, configured to allocate a first IP address to the mobile node device;

The first obtaining unit is used to obtain the second IP address and the third IP address of the communication node, wherein the second IP address is assigned to the mobile node device by the second router where the mobile node device was previously located;

The first receiving unit is configured to receive the first session data packet sent by the mobile node device; the first sending unit is configured to use the first IP address allocated by the first allocating unit as the source IP address to the communication node. Send the first session data packet received by the first receiving unit, and send the second IP address obtained by the first obtaining unit to the communication node, so that the communication node receives the first After receiving the session data packet, use the second IP address as the final source IP address, and submit the first session data packet and the second IP address to the upper layer of the IP layer of the communication node;

The second receiving unit is configured to receive the second session data packet of the communication node with the third IP address as the source IP address and the first IP address as the destination IP address;

The first sending unit is also configured to directly send the second session data packet received by the second receiving unit to the mobile node device using the second IP address obtained by the first obtaining unit as the destination IP address. , so that after receiving the second session data packet, the mobile node device uses the second IP address as the final destination IP address, and sends the second session data packet and submit the second IP address to the upper layer of the IP layer of the mobile node device; or the first sending unit is further configured to send the second session received by the second receiving unit to the mobile node device. data packet, and sends the second IP address obtained by the first obtaining unit to the mobile node device, so that after receiving the second session data packet, the mobile node device uses the second IP address The address is the final destination IP address, and the second session data packet and the second IP address are delivered to the upper layer of the IP layer of the mobile node device.

14. The first router according to claim 13, characterized in that the first receiving unit is specifically used for:

Receive a first session data packet in which the mobile node device uses the second IP address as the source IP address and the third IP address as the destination IP address.

15. The first router according to claim 14, further comprising: a first replacement unit, configured to replace the IP address received by the first receiving unit with the first IP address allocated by the first allocating unit. The second IP address at the source IP address field in the first session packet.

16. The first router according to claim 13, characterized in that the first receiving unit is specifically used for:

Receive a first session data packet in which the mobile node device uses the first IP address as the source IP address and the third IP address as the destination IP address.

17. The first router according to claim 16, further comprising: The third receiving unit is configured to receive the router request message sent by the mobile node device, the router request message carries a first flag bit, the first flag bit is a first value, and the first value is used for Indicates that the mobile node device will use the first IP address as the source IP address to send the first session data packet;

The first binding unit is configured to establish a binding relationship with the communication node through a proxy binding update message after the third receiving unit receives the router request message, and the proxy binding update message carries the The first flag, the first IP address and the second IP address;

The fourth receiving unit is configured to receive a proxy binding response message sent by the communication node relative to the proxy binding update message sent by the first binding unit, where the proxy binding response message is used to indicate the communication The node agrees that the mobile node device uses the first IP address as the source IP address to send the first session data packet.

18. The first router according to any one of claims 13-17, characterized in that the first acquisition unit:

Specifically used to obtain the session information of the mobile node device through a centralized device. The centralized device is used to record the session information of the mobile node device. The session information includes the identity mark of the mobile node device, the The second IP address and the third IP address are mentioned above.

19. The first router according to any one of claims 13-17, characterized in that the first acquisition unit:

Specifically used to obtain session information of the mobile node device from the second router, The session information includes the identity mark of the mobile node device, the second IP address and the third IP address.

20. The first router according to any one of claims 1 to 17, characterized in that, the first acquisition unit:

Specifically used to obtain session information from the mobile node device, where the session information includes the identity mark of the mobile node device, the second IP address and the third IP address.

21. A mobile node device, characterized in that it includes:

The first receiving unit is configured to receive the first IP address assigned by the first router after being attached to the first router;

The first sending unit is configured to send the first session data packet to the first router, so that the first router sends the first session data packet to the communication node using the first IP address as the source IP address, and send the second IP address of the second router where the mobile node device was previously located to the communication node, thereby causing the communication node to use the second IP address after receiving the first session data packet. is the final source IP address, and submits the first session data packet and the second IP address to the upper layer of the IP layer of the communication node;

A second receiving unit configured to receive a second session data packet sent by the first router with the second IP address as the destination IP address; or

For receiving the second session data packet sent by the first router and the second IP address; A delivery unit, configured to use the second IP address as the final destination IP address, and deliver the second session data packet and the second IP address received by the second receiving unit to the IP address of the mobile node device. The upper layer of the layer.

22. The mobile node device according to claim 21, characterized in that the first sending unit is specifically used for:

Using the second IP address as the source IP address and the third IP address as the destination IP address, send the first session data packet to the first router.

23. The mobile node device according to claim 21, characterized in that the first sending unit is specifically used for:

Using the first IP address as the source IP address and the third IP address as the destination IP address, send the first session data packet to the first router.

24. The mobile node device according to claim 23, further comprising: a second sending unit, configured to send a router request message to the first router, the router request message carrying a first flag bit , the first flag bit is a first value, and the first value is used to indicate that the mobile node device will use the first IP address as the source IP address to send the first session data packet.

25. A first router, characterized by including:

A first processor configured to allocate a first IP address to the mobile node device;

The first receiver is used to obtain the second IP address and the third IP address of the communication node, which The second IP address is assigned to the mobile node device by the second router where the mobile node device was previously located;

The first receiver is also used to receive the first session data packet sent by the mobile node device;

The first sender is configured to send the first session data packet received by the first receiver to the communication node using the first IP address allocated by the first processor as the source IP address, and send the first session data packet to the communication node. The second IP address obtained by the receiver is sent to the communication node, so that after receiving the first session data packet, the communication node uses the second IP address as the final source IP address, and The first session data packet and the second IP address are submitted to an upper layer of the IP layer of the communication node;

The first receiver is also used to receive the second session data packet of the communication node with the third IP address as the source IP address and the first IP address as the destination IP address;

The first sender is also configured to directly send the second session data packet received by the first receiver to the mobile node device using the second IP address obtained by the first receiver as the destination IP address. , so that after receiving the second session data packet, the mobile node device uses the second IP address as the final destination IP address, and combines the second session data packet with the second IP address Delivered to a layer above the IP layer of the mobile node device; or

The first sender is further configured to send the second session data packet received by the first receiver to the mobile node device, and send the second IP address obtained by the first receiver. to the mobile node device, so that after receiving the second session data packet, the mobile node device uses the second IP address as the final destination IP address, and combines the second session data packet with The second IP address is submitted to an upper layer of the IP layer of the mobile node device.

26. The first router according to claim 25, characterized in that the first receiver is specifically used for:

27. The first router according to claim 26, characterized in that the first processor is also used to:

Replace the second IP address at the source IP address field in the first session data packet received by the first receiver with the first IP address assigned by the first processor.

28. The first router according to claim 25, characterized in that the first receiver is specifically used for:

29. The first router according to claim 28, characterized in that the first receiver is also used for:

Receive a router request message sent by the mobile node device, the router request message contains a first flag bit, the first flag bit is a first value, and the first value is used to represent The mobile node device will use the first IP address as the source IP address to send the first session data packet;

The first sender is also configured to establish a binding relationship with the communication node through a proxy binding update message after the first receiver receives the router request message, and the proxy binding update message contains The first flag, the first IP address and the second IP address;

The first receiver is also configured to receive a proxy binding response message sent by the communication node relative to the proxy binding update message sent by the first sender, where the proxy binding response message is used to represent the The communication node agrees that the mobile node device uses the first IP address as the source IP address to send session data packets.

30. The first router according to any one of claims 25-29, characterized in that, the first receiver,

It is also used to obtain the session information of the mobile node device through a centralized device. The centralized device is used to record the session information of the mobile node device. The session information includes the identity mark of the mobile node device, the The second IP address and the third IP address.

31. The first router according to any one of claims 25-29, characterized in that, the first receiver,

It is also used to obtain session information of the mobile node device from the second router, where the session information includes the identity flag of the mobile node device, the second IP address and the third IP address.

32. The first router according to claims 25-29, characterized in that, the first receiver,

It is also used to obtain session information from the mobile node device, where the session information includes the identity mark of the mobile node device, the second IP address and the third IP address.

33. A mobile node device, characterized in that it includes:

The first receiver is configured to receive the first IP address assigned by the first router after being attached to the first router;

The first sender is configured to send a first session data packet to the first router, so that the first router sends the first session data packet to the communication node using the first IP address as the source IP address, And send the second IP address of the second router where the mobile node device was previously located to the communication node, so that after receiving the first session data packet, the communication node uses the second IP address is the final source IP address, and submits the first session data packet and the second IP address to the upper layer of the IP layer of the communication node;

The first receiver is also configured to receive the second session data packet sent by the first router with the second IP address as the destination IP address; or

Also configured to receive the second session data packet sent by the first router and the second

IP address;

The first processor is configured to use the second IP address as the final destination IP address, and submit the second session data packet and the second IP address received by the first receiver to the mobile phone The upper layer of the IP layer of the node device.

34. The mobile node device according to claim 33, characterized in that the first transmitter is specifically used for:

35. The mobile node device according to claim 33, characterized in that the first transmitter is specifically used for:

36. The mobile node device according to claim 35, characterized in that the first transmitter is also used for:

Send a router request message to the first router, the router request message carries a first flag bit, the first flag bit is a first value, and the first value is used to indicate that the mobile node device will The first IP address is a source IP address for sending the first session data packet.

37. A session system for distributed mobility management, characterized by including a first router, a second router, a mobile node device and a communication node, wherein,

The first router is used to allocate a first IP address to the mobile node device, and obtain a second IP address and a third IP address of the communication node. The second IP address is the mobile node device. assigned to the mobile node device by the second router where it was previously located, receiving the first session data packet sent by the mobile node device, and sending the first session data packet to the communication node using the first IP address as the source IP address. A session data packet, and sends the second IP address to the communication node, and receives the second session data packet from the communication node with the third IP address as the source IP address and the first IP address as the destination IP address. , directly send the second session data packet to the mobile node device with the second IP address as the destination IP address, or send the second session data packet to the mobile node device, and send the second IP address to the mobile node device. The address is sent to the mobile node device;

The mobile node device is configured to receive the first IP address assigned by the first router, send a first session data packet to the first router, and receive the second IP address sent by the first router. The second session data packet of the destination IP address, or receive the second session data packet sent by the first router and the second IP address, use the second IP address as the final destination IP address, and send the second session data packet to the destination IP address. The second session data packet and the second IP address are submitted to an upper layer of the IP layer of the mobile node device;

The communication node is configured to, after receiving the first session data packet sent by the first router, use the second IP address as the final source IP address, and combine the first session data packet with the The second IP address is submitted to the upper layer of the IP layer of the communication node, the third IP address is used as the source IP address, and the first IP address is used as the destination IP address to send the second session data packet to the first router.