CN101635663A - Data transmission method, data transmission system and network equipment - Google Patents

Abstract

The embodiment of the present invention discloses a data transmission method, including: receiving a data packet from the mobile node, obtaining source IP address information and destination IP address information of the data packet; The address information establishes a first SHIM6 association tunnel for transmitting the data packet between the mobile agent device in the home network of the peer node, and the data between the mobile node and the peer node is carried out through the first SHIM6 association tunnel. transmission. The implementation of the invention also discloses a network device and a data transmission system, which optimizes the communication route, shortens the transmission time delay, saves network resources, and reduces the burden of data forwarding and processing of the source network mobile agent device.

Description

Data transmission method, system and network equipment

technical field

The present invention relates to the communication field, in particular to a data transmission method, system and network equipment.

Background technique

DMMS (Decentralized Mobility Management Service, non-centralized mobility management service architecture) deploys mobility management equipment MA (Mobility Agent, mobile agent) at the edge of the network to provide mobility services for mobile nodes; MN (Mobile Node, mobile node) Location information is managed by D-DNS (Domain Name Server, Domain Name Server; Dynamic-DNS (Dynamic Domain Name Server)); CN (Corresponding Node, peer node) is the peer node that communicates with MN; oMA (old MA) It is a decentralized mobility management device used at the edge of the oAN (old AN access network) network; nMA is a decentralized mobility management device used at the edge of the nAN network.

As shown in Figure 1, in order to ensure the continuity of communication with the CN when the MN is handing over, the SHIM6 (Site Multihoming by IPv6 Intermediation, site multi-homing operation through IPv6 intermediate media) protocol is used for interaction and in the oMA Establish SHIM6 association with nMA for data forwarding. When a MN enters a new network, it will first go to the D-DNS to register or update the binding relationship between its ID and IP address; among them, the address of the MN in the oAN network is oIP; and when the CN wants to initiate communication with the MN, The CN will actively query the IP address of the MN through the D-DNS through the ID of the MN, and the MN moves to the adjacent network (new Access Network, nAN), and obtains the adjacent network information through mobile detection. In the process of moving, in order to maintain the continuity of communication with the CN, the MN will still use oIP as the source address of the data packet to transmit data to the CN. At this time, the nMA in the nAN will analyze the received data packet according to the The MN is a user who moves from the oAN, and then initiates a SHIM6 interaction with the oMA, and establishes a SHIM6 connection between the nMA and the oMA. After the SHIM6 connection between nMA and oMA is established, nMA will send the data packet to CN through oMA by adding SHIIM6 header to the data packet sent by MN. At the same time, during the whole process, CN will still send the data packet to oIP to MA, and after oMA receives the data packet from CN, it will also forward the data packet to MN through nMA by adding SHIM6 header.

In the process of realizing the present invention, the inventor finds that there are at least the following problems in the prior art:

When the MN communicates across the MA from the source network to the adjacent network, in order to maintain the continuity of communication with the CN, the oMA in the source network is required to process and route the communication data, thus increasing the oMA in the source network The burden of data processing increases the delay of data transmission and reduces the efficiency of data transmission.

Contents of the invention

Embodiments of the present invention provide a data transmission method, system, and network equipment based on a decentralized mobility management service architecture, so as to reduce transmission delay, save network resources, and reduce the burden of data forwarding processing on a source network mobile agent equipment.

A data transmission method according to an embodiment of the present invention includes:

Receive a data packet from the mobile node, and obtain source IP address information and destination IP address information of the data packet;

According to the source IP address information and the destination IP address information, a first SHIM6 association tunnel for transmitting the data packet is established between the mobile agent device in the home network of the peer node, and the first SHIM6 association tunnel is carried out through the first SHIM6 association tunnel. Data transmission between the mobile node and the correspondent node.

A network device according to an embodiment of the present invention includes:

a receiving unit, configured to receive a data packet from the switched mobile node;

an obtaining unit, configured to obtain source IP address information and destination IP address information of the data packet from the data packet received by the receiving unit;

A first SHIM6 association establishment unit, configured to establish a first SHIM6 association tunnel for transmitting the data packet between the mobile proxy device in the home network of the peer node and the peer node according to the source IP address information and the destination IP address information ;

The first data transmission unit is configured to perform data transmission between the mobile node and the correspondent node through the first SHIM6 association tunnel established by the first SHIM6 association establishment unit.

A data transmission system according to an embodiment of the present invention includes a mobile node and a peer node in conversation with the mobile node, and further includes:

The mobile proxy device in the adjacent network receives the data packet from the mobile node, obtains the source IP address information and the destination IP address information of the data packet from the data packet, and according to the source IP address information and the destination IP address information Establishing a first SHIM6-associated tunnel for transmitting the data packet between the mobile agent device in the home network of the peer node, and performing data transmission between the mobile node and the peer node through the first SHIM6-associated tunnel;

The peer node belongs to the mobile agent device in the network, receives the SHIM6 association request of the mobile agent device in the adjacent network, establishes the first SHIM6 associated tunnel with the mobile agent device in the adjacent network, and passes the first SHIM6 associated tunnel Perform data transmission between the correspondent node and the mobile node.

Implementing the embodiment of the present invention, when the mobile node switches from the source network to the adjacent network, the mobile proxy device in the adjacent network receives the data packet from the mobile node, and obtains the source IP address information and The destination IP address information, according to the source IP address information and the destination IP address information, establishes a first SHIM6 associated tunnel for transmitting the data packet with the mobile agent device in the home network of the peer node, through the first SHIM6 association tunnel A SHIM6-associated tunnel is used for data transmission between the mobile node and the peer node, without the need for data forwarding through the source network, which optimizes the route for the mobile node to communicate with the peer node when the coverage area is switched, effectively shortening the transmission time The time delay saves network resources, and reduces the burden of data forwarding and processing of the source network mobile proxy device.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings without any creative effort.

FIG. 1 is a schematic diagram of a network structure using the SHIM6 protocol for interaction in order to ensure the continuity of communication with the CN when the MN performs handover in the prior art;

FIG. 2 is a flow chart of a data transmission method based on a decentralized mobility management service architecture provided by an embodiment of the present invention;

FIG. 3 is a flow chart of another data transmission method based on a decentralized mobility management service architecture provided by an embodiment of the present invention;

FIG. 4 is a specific flowchart of a data transmission method based on a decentralized mobility management service architecture provided by an embodiment of the present invention;

FIG. 5 is a specific flowchart of another data transmission method based on a decentralized mobility management service architecture provided by an embodiment of the present invention;

FIG. 6 is a schematic composition diagram of a data transmission system based on a decentralized mobility management service architecture provided by an embodiment of the present invention;

FIG. 7 is a schematic composition diagram of a network device based on a decentralized mobility management service architecture provided by an embodiment of the present invention;

FIG. 8 is a schematic diagram of the composition of another network device based on the decentralized mobility management service architecture provided by the embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

As shown in Figure 2, a data transmission method based on a decentralized mobility management service architecture provided by an embodiment of the present invention, in the process of implementing the embodiment of the present invention, the method includes:

301. The mobile node moves from the coverage area of the source network to the adjacent network, and the mobility proxy device in the adjacent network receives a data packet from the handover mobile node.

The source network is the access network to which the mobile node belongs when the mobile node initiates a session establishment request from the peer node and establishes a session connection with the peer node. After the mobile node moves, the coverage area of the source network Another new access network that enters the coverage area, and the other access network is the adjacent network. During the communication session between the mobile node and the peer node, the mobile node moves from the coverage area of the source network to the adjacent network, the communication session is switched from the source network access to the adjacent network access, and the network information of the adjacent network is obtained through mobile detection. In order to maintain uninterrupted communication with the peer node, the mobile node still uses the oIP allocated in the source network as the source IP address for data transmission.

302. The mobility agent device in the adjacent network acquires source IP address information and destination IP address information of the data packet from the data packet.

In order to maintain uninterrupted communication with the peer node, the source IP address and the destination IP address (the IP address of the peer node) of the mobile node will not change during the communication process. The IP address of the mobile proxy device of the target node can determine the IP address of the mobile proxy device in the network to which the peer node belongs based on the destination IP address information.

303. The mobile agent device in the adjacent network initiates a SHIM6 association request with the mobile agent device in the home network of the peer node according to the destination IP address information, and the mobile agent device in the adjacent network uses the source IP address information and the destination IP address information A first SHIM6-associated tunnel for transmitting the data packet is established between the mobile proxy device in the home network of the correspondent node.

The IP address of the mobile proxy device in the network to which the peer node belongs can be determined from the destination IP address information, and a SHIM6 association request with the mobile proxy device in the network to which the peer node belongs is initiated according to the IP address, and then through the four-way handshake interaction of SHIM6, Establishing a first SHIM6 associated tunnel for transmitting the data packet with the mobile agent device in the home network of the peer node, the data packet transmitted by the first SHIM6 associated tunnel is determined by the source IP address information and the destination IP address information is uniquely identified.

304. Perform data transmission between the mobile node and the correspondent node through the first SHIM6-associated tunnel.

In this example, when the mobile node switches from the source network to the adjacent network, the communication data packets between the mobile node and the peer node are directly transmitted between the adjacent network and the network to which the peer node belongs based on the first SHIM6-associated tunnel without going through the source network. The network performs data forwarding, optimizes the route for the mobile node to communicate with the peer node when switching over the coverage area, effectively shortens the transmission delay and saves network resources, and reduces the burden of data forwarding processing on the source network mobile agent device .

As shown in Figure 3, a data transmission method based on a decentralized mobility management service architecture provided by an embodiment of the present invention, in the process of implementing the embodiment of the present invention, the method includes:

401. The mobile node moves from the coverage area of the source network to an adjacent network, and a mobility proxy device in the adjacent network receives a data packet from the mobile node.

This step 401 is similar to the step 301, and will not be repeated here.

402. Obtain source IP address information and destination IP address information of the data packet from the data packet.

This step 402 is similar to the step 302, and will not be repeated here.

403. Initiate a SHIM6 association request with the mobile agent device in the source network according to the source IP address information, and establish an account with the mobile agent device in the source network according to the source IP address information and destination IP address information. The tunnel associated with the second SHIM6 for transmitting the data packet.

The IP address of the mobile agent device in the source network can be determined by the source IP address information, and the SHIM6 association request with the mobile agent device in the source network is initiated according to the IP address, and then interacted with the four-way handshake of SHIM6 to establish an association with the source network. A second SHIM6-associated tunnel for transmitting the data packet is established between the mobile agent devices in the source network, and the data packet transmitted by the second SHIM6-associated tunnel is uniquely identified by the source IP address information and the destination IP address information.

404. Perform data transmission between the mobile node and the correspondent node through the second SHIM6-associated tunnel.

The mobile node implements communication access by connecting to the network, the peer node implements communication access through the network to which the peer node belongs, and the adjacent network is connected to the network to which the peer node belongs, and the mobile node and The data packet of the peer node is directly transmitted between the adjacent network and the network to which the peer node belongs based on the SHIM6 association tunnel.

405. Determine whether the data transmission between the mobile node and the peer node based on the second SHIM6-associated tunnel meets the threshold condition, and if so, proceed through the second SHIM6-associated tunnel established in step 404 If the data transmission between the mobile node and the correspondent node is not satisfied, step 406 is executed.

The threshold condition is a threshold condition set according to communication time and/or communication flow, and when the threshold condition is a threshold condition set according to communication time, the mobile proxy device in the adjacent network needs to pre-set the mobile The time threshold value of the data transmission between the node and the peer node based on the associated tunnel of the second SHIM6, when performing data transmission based on the associated tunnel of the second SHIM6, if it is judged that the call time is less than the preset threshold value, it indicates that the preset threshold condition is met, and the associated tunnel of the second SHIM6 is continued for data transmission, if it is judged that the call time is greater than the preset threshold value, it indicates that the preset threshold condition is not met, and then step 406 is executed .

In addition, when the preset threshold condition is a threshold condition set according to communication traffic, the mobile proxy device in the adjacent network needs to pre-set the mobile node and the peer node based on the second SHIM6 The communication traffic threshold value of the data transmission of the associated tunnel, when data transmission is performed based on the associated tunnel of the second SHIM6, if it is judged that the communication traffic of the data transmission is less than the preset threshold value, it means that the preset threshold is satisfied condition, continue the associated tunnel of the second SHIM6 for data transmission, if it is judged that the communication traffic of the data transmission is greater than the preset threshold value, it indicates that the preset threshold condition is not met, and then step 406 is executed.

It can be seen from the above description that in this implementation, according to the setting of the time threshold condition and/or the communication flow threshold condition, the prediction of the communication transmission status is realized. Therefore, those skilled in the art should understand that other similar methods can achieve the prediction of the communication transmission status. When the method or means is applied to the implementation of the present invention, it shall also belong to the scope of protection claimed in the embodiments of the present invention.

406. Initiate a SHIM6 association request with the mobile agent device in the home network of the peer node according to the destination IP address information, and according to the source IP address information and destination IP address information in the home network of the peer node A first SHIM6-associated tunnel for transmitting the data packet is established between the mobile agent devices.

In this step, before the establishment of the first SHIM6-associated tunnel is completed, the data transmission is still performed by the second SHIM6-associated tunnel, so as to ensure uninterrupted data transmission.

In this example, the threshold condition can be preset on the mobility proxy device in the adjacent network, or the threshold condition can be preset on the mobility proxy device in the source network, when the threshold condition is preset on the mobility proxy device in the source network The threshold condition, the mobile agent device in the source network sends an indication message to the mobile agent device in the adjacent network according to the judgment result according to the preset threshold condition, instructing the mobile agent device in the adjacent network to establish the Describe the tunnel associated with the first SHIM6.

407. Stop performing data transmission between the mobile node and the correspondent node through the second SHIM6-associated tunnel, and switch to performing data transmission between the mobile node and the correspondent node through the first SHIM6-associated tunnel.

In this example, the mobile proxy device in the adjacent network can predict that the mobile node in the network handover will communicate with the peer node for a long time through airtime detection or communication flow detection, and then triggers the establishment of the agent device in the adjacent network to establish a connection with the peer node. Describe the first SHIM6 association tunnel of the mobile agent device in the network to which the peer node belongs, and then realize the data transmission routing channel between the adjacent network and the peer node network, optimize the routing path, effectively shorten the transmission delay and save network traffic. resources, and reduce the burden of data forwarding processing on the source network mobile agent device.

Referring to FIG. 4 , it is a specific flowchart of a data transmission method based on a decentralized mobility management service architecture provided by an embodiment of the invention. In this embodiment, in order to simplify the description, MN is used to represent the mobile node, CN is used to represent the peer node, D-DNS is used to represent the XX domain name server, oMA is used to represent the mobile agent device in the source network, and nMA is used to represent the mobile agent device in the adjacent network , MA(CN) represents the mobile agent device in the network to which the peer node belongs, oAN represents the source network, and nAN is adjacent to the network. The method flow will be described in detail below.

501. When the MN enters a new network, it first registers (or updates) the binding relationship between its identity ID and IP address on the D-DNS (the address in the oAN is oIP), and whenever the CN wants to initiate Communication with the MN will take the initiative to query the IP address of the MN through the D-DNS through the ID of the MN.

502. The MN actively initiates communication with the CN through the IP address of the CN, and establishes a TCP connection with the CN through a 3-way handshake.

503. The MN moves to an adjacent network (nAN), and acquires adjacent network information through movement detection.

504. The MN obtains a new IP address from the nAN through the DHCP protocol.

This step 504 can be performed synchronously with the session process between the MN and the CN, or after the session ends. Generally, the interaction of signaling data and the transmission of session service data are independent of each other.

505. In the process of moving, the MN will still use oIP as the source address of the data packet to transmit data to the CN in order to always maintain the continuity of communication with the CN. At this time, the nMA in the nAN receives from the Obtain the source IP address information and the destination IP address information in the data packet, determine the IP address information of the MA (CN) according to the destination IP address information, initiate the SHIM6 interaction with the MA (CN), and perform a four-way handshake. The IP address information and the destination IP address information establish a SHIM6 connection between the nMA and the MA (CN).

506. After the SHIM6 connection between the nMA and the MA(CN) is established, the nMA will directly send the data packet sent by the MN to the MA(CN), and finally forward it to the CN. During this process, neither the MN nor the CN needs to participate in the operation, nor does it need to change the source address and destination address of the data packet.

In this example, when the mobile node switches from the source network to the adjacent network, the communication data packets between the mobile node and the peer node are directly transmitted between the adjacent network and the network to which the peer node belongs based on the first SHIM6-associated tunnel without going through the source network. The network performs data forwarding, optimizes the route for the mobile node to communicate with the peer node when switching over the coverage area, effectively shortens the transmission delay and saves network resources, and reduces the burden of data forwarding processing on the source network mobile agent device .

Referring to FIG. 5 , it is a specific flowchart of a data transmission method based on a decentralized mobility management service architecture provided by an embodiment of the invention, and the method will be described in detail below.

601. When the MN enters a new network, it first registers (or updates) the binding relationship between its identity ID and IP address (the address in the oAN is oIP) on the D-DNS, and whenever the CN wants to initiate Communication with the MN will take the initiative to query the IP address of the MN through the D-DNS through the ID of the MN.

602. The MN actively initiates communication with the CN through the IP address of the CN, and establishes a TCP connection with the CN through a 3-way handshake.

603. The MN moves to an adjacent network (nAN), and acquires neighbor network information through movement detection.

604. The MN obtains a new IP address from the nAN through the DHCP protocol.

This step 604 can be performed synchronously with the session process between the MN and the CN, or after the session ends. Generally, the interaction of signaling data and the transmission of session service data are independent of each other.

605. In the process of moving, in order to maintain the continuity of communication with the CN, the MN will still use oIP as the source address of the data packet to transmit data to the CN. At this time, the nMA in the nAN will, according to the received data packet, Obtain source IP address information and destination IP address information, analyze that the MN is a user who moved from oAN according to the source IP address information, and then initiate SHIM6 interaction with oMA, and perform 4 handshakes, according to the source IP address information and purpose IP address information establishes a SHIM6 connection between nMA and oMA.

606. After the SHIM6 connection between the nMA and the oMA is established, the nMA receives the data packet from the MN, and the nMA adds a SHIIM6 header to the received data packet from the MN, based on the SHIM6 association tunnel between the nMA and the oMA, to the oMA Transmitting a data packet from the MN, after receiving the data packet, the oMA transmits the data packet to the MA (CN), and sends the data to the CN via the MA (CN). Correspondingly, during the whole process, the CN still uses oIP serves as the destination address for data transmission with MN, and sends the data to oMA. After oMA receives the data packet from CN, it also sends the data packet to nMA by adding SHIM6 header, and then sends the data packet to nMA via nMA. MN.

607. The nMA discovers that the MN and the CN will communicate for a long time by setting a time threshold or a communication traffic threshold. In order to optimize routing and save network resources, the nMA acquires source IP address information and destination information from the data packets from the MN. IP address information, determine the IP address information of MA (CN) according to the destination IP address information, initiate the SHIM6 interaction with MA (CN), perform four handshakes, according to the source IP address information and destination IP address information in nMA Establish a SHIM6 connection with MA(CN).

608. After the SHIM6 connection between the nMA and the MA(CN) is established, the nMA will directly send the data packet sent by the MN to the MA(CN), and finally forward it to the CN. During this process, neither the MN nor the CN needs to participate in the operation, nor does it need to change the source and destination addresses of the data packet.

In this example, the mobile proxy device in the adjacent network can predict that the mobile node in the network handover will communicate with the peer node for a long time through airtime detection or communication flow detection, and then triggers the establishment of the agent device in the adjacent network to establish a connection with the peer node. Describe the first SHIM6 association tunnel of the mobile agent device in the network to which the peer node belongs, and then realize the data transmission routing channel between the adjacent network and the peer node network, optimize the routing path, effectively shorten the transmission delay and save network traffic. resources, and reduce the burden of data forwarding processing on the source network mobile agent device.

Referring to FIG. 6 , it is a schematic composition diagram of a data transmission system based on a decentralized mobility management service architecture provided by an embodiment of the present invention. The data transmission system will be described in detail below. The data transmission system mainly includes a mobile node MN3 , the mobile agent device oMA4 in the source network, the mobile agent device nMA1 in the adjacent network, the peer node CN5, and the mobile agent device MA(CN)2 in the network to which CN5 belongs. in:

Mobile Agent MA (Gateway): A mobility management device located in the access network. In this example, oMA4, nMA1, and MA(CN)2 are mobile agent devices corresponding to their respective networks, and nMA1 is the mobile agent device in the adjacent network. A mobile agent device, configured to receive a data packet from the mobile node, obtain source IP address information and destination IP address information of the data packet from the data packet, and obtain the source IP address information and the destination IP address information according to the source IP address information and the destination IP address information in the data packet A first SHIM6-associated tunnel for transmitting the data packet is established with the mobile agent device in the home network of the correspondent node, and data transmission between the mobile node and the correspondent node is performed through the first SHIM6-associated tunnel. During specific implementation, the mobile proxy device in the adjacent network is also used to establish a second connection for transmitting the data packet with the mobile proxy device in the source network according to the source IP address information and the destination IP address information. A SHIM6-associated tunnel, performing data transmission between the mobile node and the peer node through a second SHIM6-associated tunnel, and judging whether the data transmission between the mobile node and the peer node based on the second SHIM6-associated tunnel satisfies a preset If the threshold condition is met, continue the data transmission between the mobile node and the peer node, otherwise, perform data transmission based on the second SHIM6 associated tunnel between the mobile node and the peer node.

The MA (CN) 2 is a mobile proxy device in the home network of the peer node, and is used to receive the SHIM6 association request of the mobile proxy device in the adjacent network, and establish the first connection with the mobile proxy device in the adjacent network. A SHIM6-associated tunnel, for performing data transmission between the correspondent node and the mobile node through the first SHIM6-associated tunnel.

Mobile Node (MN): Mobile terminal, without supporting special protocols other than IPv6 (Internet Protocol Version 6, Internet Protocol Version 6), including notebook computers, single-mode or multi-mode mobile phones, PDA (Personal digital assistant, personal digital assistant) ), IAD (Integrated Access Device, integrated access device), etc.

Corresponding communication node (CN): a node that can communicate with the MN, which can be a fixed node or a mobile node, and also only needs to support the IPv6 protocol. If it is a mobile node, its function will be the same as that of MN.

In this example, when the mobile node switches from the source network to the adjacent network, the communication data packets between the mobile node and the peer node are directly transmitted between the adjacent network and the network to which the peer node belongs based on the first SHIM6-associated tunnel without going through the source network. The network performs data forwarding, optimizes the route for the mobile node to communicate with the peer node when switching over the coverage area, effectively shortens the transmission delay and saves network resources, and reduces the burden of data forwarding processing on the source network mobile agent device .

Referring to FIG. 7 , it is a schematic diagram of the composition of a network device based on a decentralized mobility management service architecture provided by an embodiment of the present invention. The network device may correspond to nMA in the above-mentioned data transmission system embodiment, and mainly includes:

The receiving unit 10 is configured to receive a data packet from the mobile node when the mobile node moves from the coverage area of the source network to an adjacent network.

The obtaining unit 11 is configured to obtain source IP address information and destination IP address information of the data packet from the data packet received by the receiving unit.

The first SHIM6 association establishment unit 12 is configured to establish a first SHIM6 association for transmitting the data packet with the mobile agent device in the home network of the peer node according to the source IP address information and the destination IP address information tunnel. According to the purpose IP address information, the IP address information of the mobile agent equipment MA (CN) in the network to which the peer node belongs can be determined, and then a SHIM6 association establishment request is initiated to the MA (CN), and according to the source IP address information and the purpose The IP address information establishes a first SHIM6-associated tunnel for transmitting the data packet between the nMA and the MA(CN).

The first data transmission unit 13 is configured to perform data transmission between the mobile node and the correspondent node through the first SHIM6 association tunnel established by the first SHIM6 association establishment unit.

In this example, when the mobile node switches from the source network to the adjacent network, the communication data packets between the mobile node and the peer node are directly transmitted between the adjacent network and the network to which the peer node belongs based on the first SHIM6-associated tunnel without going through the source network. The network performs data forwarding, optimizes the route for the mobile node to communicate with the peer node when switching over the coverage area, effectively shortens the transmission delay and saves network resources, and reduces the burden of data forwarding processing on the source network mobile agent device .

Referring to FIG. 8 , it is a schematic diagram of the composition of another network device based on a decentralized mobility management service architecture provided by the embodiment of the present invention. The network device may correspond to nMA in the above data transmission system embodiment. mainly include:

The receiving unit 20 is configured to receive data packets from the handover mobile node.

The obtaining unit 21 is configured to obtain source IP address information and destination IP address information of the data packet from the data packet received by the receiving unit 20 .

The first SHIM6 association establishment unit 22 is configured to establish a first SHIM6 association for transmitting the data packet with the mobile agent device in the home network of the peer node according to the source IP address information and the destination IP address information tunnel. According to the purpose IP address information, the IP address information of the mobile agent equipment MA (CN) in the network to which the peer node belongs can be determined, and then a SHIM6 association establishment request is initiated to the MA (CN), and according to the source IP address information and the purpose The IP address information establishes a first SHIM6-associated tunnel for transmitting the data packet between the nMA and the MA(CN).

The first data transmission unit 23 is configured to perform data transmission between the mobile node and the correspondent node through the first SHIM6 association tunnel established by the first SHIM6 association establishment unit 22 .

The second SHIM6 association establishment unit 24 is used for initiating a SHIM6 association request with the mobile agent device in the source network according to the source IP address information, and in the source network according to the source IP address information and the destination IP address information A second SHIM6-associated tunnel for transmitting the data packet is established between the mobile proxy devices. According to the source IP address information, the IP address information of the mobile agent device oMA in the source network can be determined, and then a SHIM6 association establishment request is initiated to the oMA, and the nMA and oMA are established according to the source IP address information and destination IP address information. A second SHIM6-associated tunnel for transmitting the data packet.

The second data transmission unit 25 is configured to perform data transmission between the mobile node and the correspondent node through the second SHIM6 association tunnel established by the second SHIM6 association establishment unit.

A judging unit 26, configured to judge whether the data transmission between the mobile node and the correspondent node based on the second data transmission unit 25 satisfies the communication time threshold condition and/or the communication traffic threshold condition, and if so, indicate the The second data transmission unit 25 continues to perform data transmission between the mobile node and the correspondent node, otherwise, instructs the first data transmission unit 23 to perform data transmission between the mobile node and the correspondent node.

The threshold condition setting unit 27 is configured to set a communication time threshold condition and/or a communication traffic threshold condition.

The storage unit 28 is configured to store the threshold condition set by the threshold condition setting unit 27 .

Implementing the embodiment of the present invention, when the mobile node switches from the source network to the adjacent network, the mobile proxy device in the adjacent network receives the data packet from the mobile node, and obtains the source IP address information and The destination IP address information, according to the source IP address information and the destination IP address information, establishes a first SHIM6 associated tunnel for transmitting the data packet with the mobile agent device in the home network of the peer node, through the first SHIM6 association tunnel A SHIM6-associated tunnel is used for data transmission between the mobile node and the peer node, without the need for data forwarding through the source network, which optimizes the route for the mobile node to communicate with the peer node when the coverage area is switched, effectively shortening the transmission time The time delay saves network resources, and reduces the burden of data forwarding and processing on the source network mobile proxy device.

In another embodiment of the present invention, when the mobile node is handed over from the source network to the adjacent network, the mobile proxy device in the adjacent network receives the data packet from the mobile node, and obtains the source of the data packet from the data packet IP address information and purpose IP address information, according to described source IP address information and purpose IP address information, establish the second SHIM6 associated tunnel for transmitting the data packet with the mobile agent device in the source network, based on the The second SHIM6-associated tunnel performs the data transmission between the mobile node and the peer node, and judges whether the data transmission based on the second SHIM6-associated tunnel satisfies the communication time threshold condition and/or the communication flow threshold condition, and when the judgment is yes, Data transmission is performed based on the second SHIM6-associated tunnel, and when it is judged to be no, a mobile proxy device in the home network of the peer node is established for transmitting the The first SHIM6-associated tunnel of the data packet is used for data transmission between the mobile node and the correspondent node through the first SHIM6-associated tunnel. The adjacent network and the source network are generally physically adjacent networks, and the delay in establishing a SHIM6-associated tunnel is short. The adjacent network and the network to which the peer node belongs are generally physically far apart, and the delay in establishing a SHIM6-associated tunnel is relatively short. Long (four-way handshake is required to establish a SHIM6 associated tunnel), so in short-time communication or small-flow communication conditions after switching (predict communication time or communication traffic according to communication time threshold conditions and/or communication traffic threshold conditions), Carrying out data transmission based on the second SHIM6-associated tunnel can effectively speed up the switching speed, and in the case of long-time communication or large-traffic communication predicted after the handover, data transmission based on the second SHIM6-associated tunnel can effectively Optimizing the route for the mobile node to communicate with the peer node when the coverage area is switched, shortening the transmission delay and saving network resources, and reducing the burden of data forwarding and processing on the source network mobile proxy device.

Through the description of the above embodiments, those of ordinary skill in the art can understand that all or part of the steps in the method of the above embodiments can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable When the program is executed, the program includes the steps of the above-mentioned method embodiment, the storage medium described, such as: ROM/RAM, magnetic disk, optical disk, etc.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (9)

1. A data transmission method, characterized in that, comprising: Receive a data packet from the switched mobile node, and obtain source IP address information and destination IP address information of the data packet; According to the source IP address information and the destination IP address information, the first site multi-home operation protocol SHIM6 for transmitting the data packet through the IPv6 intermediate medium is established between the mobile agent device in the home network of the peer node. An associated tunnel, through which the first SHIM6 associated tunnel performs data transmission between the mobile node and the correspondent node. 2. The method according to claim 1, characterized in that, according to the source IP address information and the destination IP address information, a mobile proxy device in the home network of the peer node is established for transmitting the The first SHIM6 associated tunnel of the data packet, the step of performing the data transmission between the mobile node and the peer node through the first SHIM6 associated tunnel includes: Establish a second SHIM6-associated tunnel for transmitting the data packet with the mobility agent device in the source network according to the source IP address information and the destination IP address information, and perform the movement through the second SHIM6-associated tunnel Data transmission between nodes and peer nodes; Judging whether the data transmission between the mobile node and the peer node based on the second SHIM6-associated tunnel meets a threshold condition, and if so, continue to transmit the data between the mobile node and the peer node through the second SHIM6-associated tunnel data transmission, Otherwise, according to the source IP address information and the destination IP address information, a first SHIM6 association tunnel for transmitting the data packet is established between the mobile agent device in the home network of the peer node, and through the first SHIM6 association The tunnel performs data transmission between the mobile node and the correspondent node. 3. The method according to claim 2, wherein the meeting the threshold condition is meeting a time threshold and/or a flow threshold. 4. A network device, characterized in that it includes: a receiving unit, configured to receive a data packet from the switched mobile node; an obtaining unit, configured to obtain source IP address information and destination IP address information of the data packet from the data packet received by the receiving unit; A first SHIM6 association establishment unit, configured to establish a first SHIM6 association tunnel for transmitting the data packet between the mobile proxy device in the home network of the peer node and the peer node according to the source IP address information and the destination IP address information ; The first data transmission unit is configured to perform data transmission between the mobile node and the correspondent node through the first SHIM6 association tunnel established by the first SHIM6 association establishment unit. 5. The device of claim 4, further comprising: The second SHIM6 association establishment unit is used to establish a second SHIM6 association tunnel for transmitting the data packet with the mobile agent device in the source network according to the source IP address information and the destination IP address information; The second data transmission unit is configured to perform data transmission between the mobile node and the peer node through the second SHIM6 association tunnel established by the second SHIM6 association establishment unit; a judging unit, configured to judge whether the data transmission between the mobile node and the correspondent node based on the second data transmission unit satisfies a threshold condition, and if so, instruct the second data transmission unit to continue the movement Data transmission between the mobile node and the peer node, otherwise, instruct the first data transmission unit to perform data transmission between the mobile node and the peer node. 6. The apparatus of claim 5, further comprising: The threshold condition setting unit is used to set the communication time threshold condition and/or the communication flow threshold condition. 7. A data transmission system, comprising a mobile node and a peer node in conversation with the mobile node, characterized in that it comprises: The mobile proxy device in the adjacent network receives the data packet from the mobile node, obtains the source IP address information and the destination IP address information of the data packet from the data packet, and according to the source IP address information and the destination IP address information Establishing a first SHIM6-associated tunnel for transmitting the data packet between the mobile agent device in the home network of the peer node, and performing data transmission between the mobile node and the peer node through the first SHIM6-associated tunnel; The peer node belongs to the mobile agent device in the network, receives the SHIM6 association request of the mobile agent device in the adjacent network, establishes the first SHIM6 associated tunnel with the mobile agent device in the adjacent network, and passes the first SHIM6 associated tunnel Perform data transmission between the correspondent node and the mobile node. 8. The system according to claim 7, wherein the mobile proxy device in the adjacent network is further configured to communicate with the mobile proxy device in the source network according to the source IP address information and the destination IP address information Establishing a second SHIM6-associated tunnel for transmitting the data packet, performing data transmission between the mobile node and the peer node through the second SHIM6-associated tunnel, and judging the relationship between the mobile node and the peer node based on the first Two, whether the data transmission of the SHIM6-associated tunnel meets the threshold condition, if so, continue the data transmission between the mobile node and the peer node, otherwise, proceed based on the first SHIM6-associated tunnel between the mobile node and the peer node data transmission. 9 . The system according to claim 8 , wherein the meeting threshold condition is meeting a time threshold and/or a flow threshold.

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