WO2017079901A1 - Routing method and routing device - Google Patents

Abstract

The present application provides a routing method and routing device and is used to improve a transmission performance of network. The routing method comprises: allocating, by a first routing device, first address information to a mobile node moving to a network of the first routing device, and establishing a mapping relationship between the first address information and second address information; transmitting, by the first routing device, the mapping relationship to a second routing device, the mapping relationship is used for the second routing device to modify second address information received from a communication node and sent to the mobile node in a data packet as the first address information; receiving, by the first routing device, the data packet transmitted by the second routing device and modified as the first address information; modifying, by the first routing device, and according to the mapping relationship, the first address information received in the data packet as the second address information; transmitting, by the first routing device, the data packet modifying the first address information as the second address information to the mobile node.

Description

Routing method and routing device Technical field

The present invention relates to the field of communications, and in particular, to a routing method and a routing device.

Background technique

The Internet Protocol (English Protocol: Internet Protocol, IP for short) data packet is routed along the network topology in the network, that is, the network prefix of the IP packet destination address belongs to which router, then the data packet will be routed to At the corresponding router. However, there are times when there is a need to change the routing path of IP packets. Tunneling techniques are used in existing networks to implement routing changes for IP packets. Tunneling usually involves adding extra data to the IP header or adding a new IP header to the original IP packet.

In the mobile scenario, when the mobile node (English name: Mobile Node, MN for short) moves to a new network, the maximum transmission unit of the network (English name: Maximum Transmission Unit, MTU for short) may change. Adding additional data to the IP header, or adding a new IP header to implement the routing change of the IP packet is likely to cause the IP packet of the MN's service flow to be fragmented, resulting in a decrease in the transmission performance of the network.

Summary of the invention

The application provides a routing method and a routing device for improving transmission performance of a network.

In one aspect, the application provides a routing method, including:

The first routing device allocates first address information to the mobile node that is moved to the network where the first routing device is located, and establishes a mapping relationship between the first address information and the second address information, where the second address information is Address information obtained by the mobile node in a home network of the mobile node;

Transmitting, by the first routing device, the mapping relationship to a second routing device, where the mapping relationship is used by the second routing device to receive the data packet sent to the mobile node from a communication node Modifying the second address information into the first address information;

Receiving, by the first routing device, a data packet that is sent by the second routing device and modified to the first address information;

The first routing device modifies the first address information in the received data packet to the second address information according to the mapping relationship;

The first routing device sends, to the mobile node, a data packet that modifies the first address information to the second address information.

Since the transition of the routing path is implemented by the mapping relationship established between the first address information and the second address information, it is not necessary to add additional data to the header information of the data packet, thereby effectively avoiding packet fragmentation. Segments, thereby improving the transmission performance of the network.

In a possible implementation, the data packet is an Internet Protocol IP data packet, the first address information is first IP address information, and the second address information is second IP address information.

In a possible implementation, the data packet is an Internet Protocol IP data packet, the first address information is first IP address information and a first port number, and the second address information is second IP address information. And the second port number. With this implementation, the amount of IP address maintained by the first routing device can be reduced. Of course, the IP address can also be combined with other parameters, not limited to the port number. The IP address and port number may also be unique, as long as the address assigned to the mobile node can be distinguished.

In a possible implementation manner, the first routing device is a routing device in a visited network of the mobile node, and the second routing device is a routing device in a home network of the mobile node.

In a possible implementation manner, the first routing device is a routing device in a visited network of the mobile node, and the second routing device is a routing device in a home network where the communication node is located. In this implementation manner, in order to reduce the redundant routing path, thereby reducing the packet loss rate and the network transmission delay, the change of the packet routing path may be directly performed between the home network of the communication node and the visited network of the mobile node.

In a possible implementation manner, the first routing device is a routing device in a visited network of the mobile node, and the second routing device is a routing device in a visited network where the communication node is located. In this implementation manner, in order to reduce the redundant routing path, thereby reducing the packet loss rate and the network transmission delay, the change of the packet routing path may be directly performed between the visited network of the communication node and the visited network of the mobile node.

In a possible implementation, the sending, by the first routing device, the mapping relationship to the second routing device includes:

The first routing device sends the second route to the control plane entity or control plane signaling The device transmits the mapping relationship.

In another aspect, the application provides a routing method, including:

The second routing device receives the mapping relationship between the first address information and the second address information sent by the first routing device, where the first address information is the first when the mobile node moves to the network where the first routing device is located The routing device allocates address information allocated by the mobile node, where the second address information is address information acquired by the mobile node in the home network of the mobile node;

The second routing device modifies the second address information in the data packet sent to the mobile node received from the communication node to the first address information according to the mapping relationship;

Transmitting, by the second routing device, the data packet modified to the first address information to the first routing device, so that the first routing device sends the first packet in the received data packet according to the mapping relationship After the address information is modified into the second address information, the data packet modified to the second address information is sent to the mobile node.

Since the transition of the routing path is implemented by the mapping relationship established between the first address information and the second address information, it is not necessary to add additional data to the header information of the data packet, thereby effectively avoiding packet fragmentation. Segments, thereby improving the transmission performance of the network.

In a possible implementation, the data packet is an Internet Protocol IP data packet, the first address information is first IP address information, and the second address information is second IP address information.

In a possible implementation, the data packet is an Internet Protocol IP data packet, the first address information is first IP address information and a first port number, and the second address information is second IP address information. And the second port number.

In a possible implementation, the second routing device modifies the second address information in the data packet sent to the mobile node received from the communication node to the first address information according to the mapping relationship. Specifically include:

The second routing device establishes a mapping relationship between the first address information and the second address information;

The second routing device receives a data packet sent by the communication node to the mobile node, and modifies the second address information in the data packet to the first address information according to the mapping relationship.

In a possible implementation manner, the first routing device is a routing device in a visited network of the mobile node, and the second routing device is a routing device in a home network of the mobile node.

In a possible implementation manner, the first routing device is a routing device in a visited network of the mobile node, and the second routing device is a routing device in a home network where the communication node is located.

In a possible implementation manner, the first routing device is a routing device in a visited network of the mobile node, and the second routing device is a routing device in a visited network where the communication node is located.

In another aspect, the application provides a routing device, including:

a processing unit, configured to allocate first address information to a mobile node that is moved to the network where the first routing device is located, and establish a mapping relationship between the first address information and the second address information, where the second address information Address information obtained by the mobile node in a home network of the mobile node;

a sending unit, configured to send, to the second routing device, the mapping relationship, where the mapping relationship is used by the second routing device to receive the data packet sent to the mobile node from a communication node Modifying the second address information into the first address information;

a receiving unit, configured to receive a data packet that is sent by the second routing device and modified to the first address information;

The processing unit is further configured to modify the first address information in the received data packet to the second address information according to the mapping relationship;

The sending unit is further configured to send, to the mobile node, a data packet that modifies the first address information to the second address information.

In a possible implementation, the data packet is an Internet Protocol IP data packet, the first address information is first IP address information, and the second address information is second IP address information.

In a possible implementation, the data packet is an Internet Protocol IP data packet, the first address information is first IP address information and a first port number, and the second address information is second IP address information. And the second port number.

In a possible implementation manner, the sending unit is specifically configured to send the mapping relationship to the second routing device by using a control plane entity or control plane signaling.

In a possible implementation manner, the first routing device is a routing device in a visited network of the mobile node, and the second routing device is a routing device in a home network of the mobile node.

In a possible implementation manner, the first routing device is a routing device in a visited network of the mobile node, and the second routing device is a route in a home network where the communication node is located. Set.

In a possible implementation manner, the first routing device is a routing device in a visited network of the mobile node, and the second routing device is a routing device in a visited network where the communication node is located.

In another aspect, the application provides a routing device, including:

a receiving module, configured to receive a mapping relationship between the first address information and the second address information sent by the first routing device, where the first address information is when the mobile node moves to the network where the first routing device is located Address information allocated by the routing device to the mobile node, where the second address information is address information acquired by the mobile node in the home network of the mobile node;

a processing module, configured to modify, according to the mapping relationship, the second address information in a data packet sent from the communication node to the mobile node to the first address information;

a sending module, configured to send, to the first routing device, a data packet modified to the first address information, so that the first routing device sends the first one of the received data packets according to the mapping relationship After the address information is modified into the second address information, the data packet modified to the second address information is sent to the mobile node.

In a possible implementation, the data packet is an Internet Protocol IP data packet, the first address information is first IP address information, and the second address information is second IP address information.

In a possible implementation, the data packet is an Internet Protocol IP data packet, the first address information is first IP address information and a first port number, and the second address information is second IP address information. And the second port number.

In a possible implementation manner, the processing module is specifically configured to:

Establishing a mapping relationship between the first address information and the second address information;

Receiving, by the communication node, a data packet sent to the mobile node, and modifying the second address information in the data packet to the first address information according to the mapping relationship.

In a possible implementation manner, the first routing device is a routing device in a visited network of the mobile node, and the second routing device is a routing device in a home network of the mobile node.

In a possible implementation manner, the first routing device is a routing device in a visited network of the mobile node, and the second routing device is a routing device in a home network where the communication node is located.

In a possible implementation manner, the first routing device is a visited network of the mobile node The routing device in the second routing device is a routing device in the visited network where the communication node is located.

In another aspect, the application provides a routing apparatus, including: a receiver, a transmitter, and a processor,

The processor is configured to allocate first address information to a mobile node that is moved to the network where the first routing device is located, and establish a mapping relationship between the first address information and the second address information, where the second The address information is address information acquired by the mobile node in a home network of the mobile node;

The transmitter, configured to send the mapping relationship to a second routing device, where the mapping relationship is used by the second routing device to receive the data packet sent to the mobile node from a communication node Modifying the second address information into the first address information;

The receiver is configured to receive a data packet that is sent by the second routing device and modified to the first address information;

The processor is further configured to modify the first address information in the received data packet to the second address information according to the mapping relationship;

The transmitter is further configured to send, to the mobile node, a data packet that modifies the first address information to the second address information.

In a possible implementation, the data packet is an Internet Protocol IP data packet, the first address information is first IP address information, and the second address information is second IP address information.

In a possible implementation, the data packet is an Internet Protocol IP data packet, the first address information is first IP address information and a first port number, and the second address information is second IP address information. And the second port number.

In a possible implementation manner, the transmitter is specifically configured to send the mapping relationship to the second routing device by using a control plane entity or control plane signaling.

In a possible implementation manner, the first routing device is a routing device in a visited network of the mobile node, and the second routing device is a routing device in a home network of the mobile node.

In a possible implementation manner, the first routing device is a routing device in a visited network of the mobile node, and the second routing device is a routing device in a home network where the communication node is located.

In a possible implementation manner, the first routing device is a routing device in a visited network of the mobile node, and the second routing device is a routing device in a visited network where the communication node is located.

In another aspect, the application provides a routing apparatus, including: a receiver, a transmitter, and a processor,

The receiver is configured to receive a mapping relationship between the first address information and the second address information sent by the first routing device, where the first address information is when the mobile node moves to the network where the first routing device is located Address information allocated by the first routing device to the mobile node, where the second address information is address information acquired by the mobile node in the home network of the mobile node;

The processor, configured to modify, according to the mapping relationship, the second address information in a data packet sent from the communication node to the mobile node to the first address information;

The transmitter, configured to send, to the first routing device, a data packet modified to the first address information, so that the first routing device sends the received data packet according to the mapping relationship After the first address information is modified into the second address information, the data packet modified to the second address information is sent to the mobile node.

In a possible implementation manner, the processor is specifically configured to:

Establishing a mapping relationship between the first address information and the second address information;

Receiving, by the communication node, a data packet sent to the mobile node, and modifying the second address information in the data packet to the first address information according to the mapping relationship.

In a possible implementation, the data packet is an Internet Protocol IP data packet, the first address information is first IP address information, and the second address information is second IP address information.

In a possible implementation, the data packet is an Internet Protocol IP data packet, the first address information is first IP address information and a first port number, and the second address information is second IP address information. And the second port number.

In a possible implementation manner, the first routing device is a routing device in a visited network of the mobile node, and the second routing device is a routing device in a home network of the mobile node.

In a possible implementation manner, the first routing device is a routing device in a visited network of the mobile node, and the second routing device is a routing device in a home network where the communication node is located.

In a possible implementation manner, the first routing device is a routing device in a visited network of the mobile node, and the second routing device is a routing device in a visited network where the communication node is located.

As can be seen from the above technical solutions, the embodiment of the present invention has the following advantages: the first routing device allocates first address information to a mobile node that moves to the network where the first routing device is located, and establishes the a mapping relationship between the first address information and the second address information; the first routing device sends the mapping relationship to the second routing device, and the second routing device sends the received information from the communication node according to the mapping relationship The second address information in the data packet of the mobile node is modified into the first address information; the first routing device receives a data packet sent by the second routing device and modified into the first address information. And modifying the first address information in the received data packet to the second address information according to the mapping relationship; the first routing device sends the first address information to the mobile node to modify A data packet for the second address information. Since the transition of the routing path is implemented by the mapping relationship established between the first address information and the second address information, it is not necessary to add additional data to the header information of the data packet, thereby effectively avoiding packet fragmentation. Segments, thereby improving the transmission performance of the network.

DRAWINGS

1 is a schematic diagram of a packet routing path change according to the present invention;

2 is a schematic flowchart of a routing method provided by the present invention;

3 is a schematic diagram of a distributed mobility management scenario provided by the present invention;

4 is a schematic diagram of another distributed mobility management scenario provided by the present invention;

FIG. 5 is a schematic diagram of another distributed mobility management scenario provided by the present invention; FIG.

FIG. 6 is a schematic structural diagram of an embodiment of a routing apparatus according to the present invention; FIG.

FIG. 7 is a schematic structural diagram of another embodiment of a routing apparatus according to the present invention; FIG.

FIG. 8 is a schematic structural diagram of another embodiment of a routing apparatus according to the present invention; FIG.

FIG. 9 is a schematic structural diagram of another embodiment of a routing apparatus according to the present invention.

detailed description

The terms first, second, etc. may be used in the embodiments of the present invention to describe the routing device, but the routing device should not be limited to these terms. These terms are only used to distinguish routing devices from one another. For example, the first routing device may also be referred to as a second routing device without departing from the scope of the embodiments of the present invention. Similarly, the second routing device may also be referred to as a first routing device; likewise, the second The routing device may also be referred to as a third routing device or the like, which is not limited in this embodiment of the present invention.

First introduce the key terms and basic knowledge involved in the present invention:

IP address anchor: IP anchor (or anchor), when an IP address is used as the destination address to route in the IP network, all the network entities whose packets with the IP address as the destination address are routed are called The anchor of this IP address.

Home network: A network in which the MN initially accesses and obtains a home address, and the MN can obtain address information from the home network.

Visiting the network: Other networks besides the home network.

The situation in which the IP packet routing path needs to be changed will be described below with reference to FIG. As shown in Figure 1, the mobile node obtains an IP address IP1 generated by the network prefix prefix1 in the network where router 1 (router1 in the figure) is located, when the mobile node moves to the network where router 2 (router2 in the figure) is located. In order to ensure that the service using IP1 is not interrupted, it is necessary to ensure that the mobile node continues to use IP1. In this case, the path of the IP packet with the destination address of IP1 needs to be changed from the path shown by the solid line in FIG. 1 to the dotted line. path. In the traditional centralized mobility management scheme (such as the existing IP mobility management protocol MIPv6, PMIPv6), the MN can only use one mobility anchor in the network at the same time, and this anchor point is usually performed in the network by the MN. The registration is selected by the network side. Different from the traditional centralized mobility management scheme is a distributed mobility management scheme. In the distributed mobility management scheme, a distributed method is used to deploy the mobility management anchor point, when the mobile node MN moves in the network. You can use multiple anchor points at the same time. In the above two mobility management schemes, the IP packet routing path is changed by establishing a tunnel.

In order to solve the problem that the IP data packet is segmented due to the change of the IP packet routing path by the tunnel technology, thereby causing the transmission performance of the network to be reduced, the technical solution of the present invention is proposed.

The technical solution of the present invention mainly relates to interaction between routing devices, including but not limited to gateways, routers, and the like. For ease of understanding, the solution provided by the embodiment of the present invention will be described below in conjunction with the specific execution flow of the first routing device and the second routing device in FIG.

As shown in Figure 2, the following process is included:

101. The first routing device allocates first address information to a mobile node that moves to the network where the first routing device is located, and establishes a mapping relationship between the first address information and the second address information.

The second address information is address information acquired by the mobile node in a home network of the mobile node.

Optionally, in an implementation manner, the first address information is first IP address information, where The second address information is the second IP address information.

In this implementation manner, the mobile node acquires an address information (for example, set to IPm) in the home network of the mobile node, and the first routing device maintains an IP address pool, and the IP address in the IP address pool is The first routing device acts as an anchor point. When the mobile node moves to the network where the first routing device is located, the first routing device allocates an IP address (for example, IPBm, the mobile node) from the IP address pool. The IPBm allocated to the first routing device is not perceived, and a mapping relationship between the IPBm and the IPm is established on the first routing device. Optionally, the IP address assigned by the first routing device to the mobile node is unique.

In another implementation manner, the first address information is the first IP address information and the first port number, and the second address is used to reduce the amount of the IP address that is maintained by the first routing device. The information is the second IP address information and the second port number.

In this implementation manner, the first routing device allocates the first IP address information and the first port number to the mobile node, and establishes a mapping between the first IP address information and the first port number and the second IP address information and the second port number. For details, refer to the implementation manner of the foregoing IP address information, where the first routing device allocates a pair of the mobile node from the IP pool when the mobile node moves to the network where the first routing device is located. IP address + port number and establish the corresponding mapping relationship. For example, the IP address obtained by the mobile node in the home network of the mobile node is IPm, and the port number is port-m. When the mobile node moves to the network where the first routing device is located, the first routing device is the mobile. The IP address assigned by the node is IPBm and the port number is port-B. Then, a mapping relationship between IPm+port-m and IPBm+port-B is established on the first routing device. Optionally, the IP address + port number assigned by the first routing device to the mobile node from the IP pool is unique.

Of course, the IP address can also be combined with other parameters, not limited to the port number. The IP address + port number may also be unique, as long as the address assigned to the mobile node can be distinguished.

Optionally, the first routing device receives the second address information sent by the mobile node; the first routing device may also obtain the second address information by using the control plane entity; the first routing device may also obtain the second address information by using other existing technologies. , will not repeat them here.

102. The first routing device sends the mapping relationship to a second routing device.

The first routing device sends the established mapping relationship between the first address information and the second address information to the second routing device, where the mapping relationship is used by the second routing device to be received from the communication node. The second address information in the data packet sent to the mobile node is modified to the first address information.

In a possible implementation, the data packet is an IP data packet.

In a possible implementation, the network where the first routing device is located is the visited network of the mobile node, and the network where the second routing device is located is the home network of the mobile node.

In this scenario, the data packet is sent from the communication node to the mobile node, and when the mobile node moves from the mobile node's home network to the mobile node's visited network, the packet routing path changes at the mobile node's home network and the mobile node. The nodes are visited between the visited networks. Because the network where the second routing device is located in the scenario is the home network of the mobile node, the second address information is address information allocated by the second routing device.

In a possible implementation, the network where the first routing device is located is the visited network of the mobile node, and the network where the second routing device is located is the home network where the communication node is located.

In this scenario, the data packet is sent from the communication node to the mobile node, and the mobile node moves from the home network of the mobile node to the visited network of the mobile node, thereby reducing the redundant routing path, thereby reducing the packet loss rate and network transmission. The delay, the change of the packet routing path can be directly performed between the home network of the communication node and the visited network of the mobile node.

In a possible implementation manner, the network where the first routing device is located is the visited network of the mobile node, and the network where the second routing device is located is the visited network where the communication node is located.

In this scenario, the data packet is sent from the communication node to the mobile node, the mobile node moves from the home network of the mobile node to the visited network of the mobile node, and the communication node moves from the home network of the communication node to the communication node. When visiting the network, in order to reduce the redundant routing path, thereby reducing the packet loss rate and the network transmission delay, the change of the packet routing path can be directly performed between the visited network of the communication node and the visited network of the mobile node.

In a possible implementation manner, the first routing device sends the mapping relationship to the second routing device by using a control plane entity or control plane signaling.

The establishment of the mapping relationship on the first routing device or the second routing device is accomplished with the aid of control plane signaling. The control plane here can be an independent control plane entity (for example, the mobility management entity (English full name: Mobile Managenment Entity, MME for short), software-defined network (English full name: Software Defined Network, referred to as: SDN) central controller a centralized control plane, or directly between the first routing device and the second routing device The changed signaling is used as control plane signaling.

There are two alternative mapping relationships established in the form of independent control plane entities:

Manner 1: After the first routing device establishes the mapping relationship, the first routing device sends the mapping relationship to the control plane, and then the control plane entity sends the mapping relationship to the second routing device. Optionally, the second routing device also establishes the mapping relationship.

Manner 2: The first routing device or the second routing device completes the mapping relationship establishment under the control of the control plane entity. Specifically, the control plane entity first generates a mapping relationship between the first routing device and the second routing device, and then the control entity sends the generated mapping relationship to the first routing device and the second routing device respectively.

In the form of the control plane signaling, after the first routing device establishes the mapping relationship, the first routing device sends the mapping relationship to the second router. Optionally, the second routing device sends the mapping device according to the first routing device. The mapping relationship to establish your own mapping relationship.

201. The second routing device receives the mapping relationship sent by the first routing device.

The second routing device receives the mapping relationship between the first address information and the second address information sent by the first routing device in the process 102.

The description of the first address information, the second address information, and the mapping relationship is referred to in the process 101, and details are not described herein again.

202. The second routing device modifies the second address information in the data packet sent to the mobile node received from the communication node to the first address information according to the mapping relationship.

The data packet sent by the communication node (English name: Correspondent Node, referred to as CN) to the mobile node needs to pass through the network entity of the second routing device. If the mobile node obtains the address information in the home network of the mobile node as IPm, then It can also be said that the second routing device is located on the routing path of the IPm. The data packet sent to the mobile node needs to pass through the network entity of the second routing device first, so the second routing device receives the data packet, and then the data packet according to the mapping relationship between the first address information and the second address information. The second address information in the modification is modified to the first address information.

In the process 201, the second routing device receives the mapping relationship between the second address information and the first address information sent by the first routing device. Therefore, in the process, the second routing device needs to send the mapping according to the mapping relationship. Modifying the data packet of the mobile node, specifically modifying the second address information of the data packet to the first address information; according to the description in the process 101, if the IP address is For example, if the location information acquired by the mobile node in the home network of the mobile node is IPm, and the data packet is an IP data packet, the destination address of the IP data packet sent to the mobile node is IPm. That is, the second address information of the IP data packet is IPm, and the second routing device modifies the IPm of the IP data packet to the IPBm according to the mapping relationship between the IPm and the IPBm; if the implementation manner of the IP address and the port number is taken as an example, Similarly, if the address information acquired by the mobile node in the home network of the mobile node is IPm+port-m, the destination address of the IP data packet sent to the mobile node is IPm+port-m, that is, the IP data. The second address information of the packet is IPm+port-m. Correspondingly, the second routing device modifies the IPm+port-m of the IP packet according to the mapping relationship between IPm+port-m and IPBm+port-B. IPBm+port-B.

In a possible implementation, the second routing device modifies the second address information in the data packet sent to the mobile node received from the communication node to the first address information according to the mapping relationship. Specifically include:

The second routing device establishes a mapping relationship between the first address information and the second address information;

The second routing device receives a data packet sent by the communication node to the mobile node, and modifies the second address information in the data packet to the first address information according to the mapping relationship.

In another possible implementation manner, the second routing device establishes an inverse mapping relationship between the second address information and the first address information, and the second routing device receives the communication node sent to the And moving the data packet of the node, and modifying the second address information in the data packet to the first address information according to the reverse mapping relationship.

For a specific manner for the second routing device to establish a mapping relationship, refer to the process 102, which is not described herein.

203. The second routing device sends, to the first routing device, a data packet modified to the first address information.

The second routing device sends a data packet modified to the first address information to the first routing device, and the first routing device sends the first packet in the received data packet according to the mapping relationship. The address information is modified to the second address information, and then the data packet modified to the second address information is sent to the mobile node.

103. The first routing device receives a data packet that is sent by the second routing device and modified to the first address information.

In the process, the first routing device receives the data packet sent by the second routing device in the process 203 and modified into the first address information.

104. The first routing device modifies the first address information in the received data packet to the second address information according to the mapping relationship.

In the process 103, the first routing device receives the data packet sent by the second routing device and modified to the first address information in the process 203. In the process 101, the first routing device establishes the first address information. a mapping relationship with the second address information; therefore, the first routing device modifies the first address information in the received data packet into a location according to a mapping relationship between the first address information and the second address information The second address information is described. For example, referring to the description in the processes 101 and 202, taking the implementation manner of the IP address information as an example, it is assumed that the destination address of the IP data packet addressed to the mobile node is IPm, and the destination address IPm of the IP data packet is modified in process 203. For the IPBm, the first routing device modifies the IPBm of the IP packet to the IPm according to the mapping relationship between the established IPBm and the IPm; if the implementation of the IP address information and the port number is taken as an example, the reference IP may also be used. The implementation of address information is not described here.

105. The first routing device sends, to the mobile node, a data packet that modifies the first address information to the second address information.

In the process, after the modification of the data packet by the process 104, the first routing device sends, to the mobile node, a data packet that modifies the first address information to the second address information.

In the embodiment of the present invention, the first routing device allocates first address information to the mobile node that moves to the network where the first routing device is located, and establishes a mapping relationship between the first address information and the second address information; a routing device sends the mapping relationship to the second routing device, and the second routing device modifies the second address information in the data packet sent to the mobile node received from the communication node according to the mapping relationship And the first routing device receives the data packet sent by the second routing device and modified into the first address information; and according to the mapping relationship, the received data packet The first address information is modified to the second address information; the first routing device sends, to the mobile node, a data packet that modifies the first address information to the second address information. Since the transition of the routing path is implemented by the mapping relationship established between the first address information and the second address information, it is not necessary to add additional data to the header information of the data packet, thereby effectively avoiding packet fragmentation. Segments, thereby improving the transmission performance of the network.

It should be noted that, in the above routing method, the transmission direction of the data packet is a data packet sent from the communication node to the mobile node, and the modification of the routing path of the data packet sent from the mobile node to the communication node is also applicable to the solution of the present invention. I will not repeat them here.

For the sake of understanding, the routing method in the embodiment of the present invention is specifically described in a specific application scenario:

The solution of the present invention is applicable to the traditional centralized mobility management, and is also applicable to the distributed mobility management. The following describes the distributed mobility management scenario as an example.

In a distributed mobility management scenario as shown in FIG. 3, the routing device 1 (an anchor B in the figure) serves as an anchor point in the visited network of the mobile node (the MN in the figure), and the routing device 2 (in the figure As anchorH-m), as an anchor point in the MN's home network, the routing device 3 (anchorH-c in the figure) serves as an anchor point for the home network of the CN. Since the MN moves from the MN's home network to the MN's visited network, when the IP packet is sent from the communication node (CN in the illustration) to the MN of the network where the anchorB is located, the IP packet routing path changes in the MN's home network and The MN is visited between the visited networks. Therefore, in this scenario, the anchorB is the first routing device mentioned in the present invention, and the anchorH-m is the second routing device mentioned in the present invention, and the routing path occurs along the direction of the arrow in the figure. Changed. Take the implementation of IP address information as an example. The specific process is as follows:

Assume that the destination address of the IP packet sent from the CN to the MN is IPm (IPm is the address information acquired by the mobile node in the home network of the mobile node. In this scenario, the IPm is allocated by the anchor anchorH-m in the home network of the MN. When the MN moves from the home network of the MN to the visited network of the MN, the anchor anchorB in the visited network of the MN learns the address information IPm in the home network of the MN, and the anchorB allocates an IP address IPBm to the MN ( The MN does not perceive the assigned IPBm, and establishes a mapping relationship between the IPBm and the IPm on the anchorB. The anchor relationship is sent to the anchor anchorH-m in the home network of the MN through the anchorB. At this time, the anchorH-m You can also establish a mapping between IPm and IPBm on anchorH-m.

The mapping between anchorB and anchorH-m is established with the help of control plane signaling. The control plane here may be a centralized control plane with an independent control plane entity, or may be directly exchanged signaling between the anchorB and the anchorH-m as control plane signaling. For details, refer to the description in process 102. No detailed description will be given.

anchorB needs to maintain an IP address pool. Whenever MN moves to anchorB, anchorB The MN is assigned an IP address; when the MN leaves the anchorB, the anchorB can reclaim the IP address, so the IP address MN does not perceive.

In this scenario, when the anchorH-m receives the IP data packet sent by the CN to the MN, the anchor anchorH-m in the MN home network changes the destination IP address of the IP data packet to IPm according to the mapping relationship between the received IPm and the IPBm. IPBm, and the modified IP packet is sent out. After the anchor B of the MN visited the network receives the IP data packet, the destination address IPBm is changed to IPm and sent to the MN in the visited network according to the mapping relationship between the IPBm and the IPm saved by the anchor B, thereby implementing the transition of the routing path.

The routing path in the scenario shown in Figure 3 is from anchorH-c to anchorH-m to anchorB. In the scenario shown in Figure 3, when the MN moves from the MN's home network to the MN's visited network, in order to reduce redundancy. Routing paths, thereby reducing the packet loss rate and network transmission delay. As shown in Figure 4, the change of the IP packet routing path can be directly performed between the home network of the CN and the visited network of the MN, and the routing path is anchorH- c to anchorB, therefore, in this scenario, anchorB is also the first routing device mentioned in the present invention, and anchorH-c is also the second routing device mentioned in the present invention. For the specific routing process, refer to the scenario shown in Figure 3, and details are not described here.

On the basis of the scenarios shown in FIG. 3 and FIG. 4, as shown in FIG. 5, the routing device 4 (anchorA in the figure) serves as an anchor point in the CN's visited network, when the MN moves from the MN's home network to the MN. When the visited network and the CN move from the CN's home network to the CN's visited network, in order to reduce the redundant routing path, thereby reducing the packet loss rate and network transmission delay, the IP packet routing path can be changed directly at the CN. The access network is performed between the visited network and the visited network of the MN. The routing path is anchorA to anchorB. Therefore, in this scenario, the anchorB is the first routing device mentioned in the present invention, and the anchorA is the second routing device mentioned in the present invention. It should be noted that, if the IP data packet is sent by the MN to the CN, in this scenario, the anchorA is the first routing device mentioned in the present invention, and the anchorB is the second routing device mentioned in the present invention. Refer to the scenario shown in Figure 3, and details are not described here.

For example, the IP address information and the port number or other implementations that can distinguish the addresses assigned to the mobile node can be referred to the descriptions in the application scenarios listed above. Let me repeat.

The routing method provided by the present invention is described above. The following describes the structure of the routing device according to the present invention from the perspective of the device. Referring to FIG. 6, an embodiment of the routing device provided by the present invention includes:

The processing unit 301 is configured to allocate first address information to a mobile node that is moved to the network where the first routing device is located, and establish a mapping relationship between the first address information and the second address information, where the second address The information is address information acquired by the mobile node in a home network of the mobile node;

The sending unit 302 is configured to send, to the second routing device, the mapping relationship, where the mapping relationship is used by the second routing device to receive the data packet sent to the mobile node from the communication node. The second address information is modified into the first address information;

The receiving unit 303 is configured to receive a data packet that is sent by the second routing device and modified to the first address information.

The processing unit 301 is further configured to modify the first address information in the received data packet to the second address information according to the mapping relationship;

The sending unit 302 is further configured to send, to the mobile node, a data packet that modifies the first address information to the second address information.

Optionally, the data packet is an Internet Protocol IP data packet, the first address information is first IP address information, and the second address information is second IP address information.

Optionally, the data packet is an Internet Protocol IP data packet, the first address information is first IP address information and a first port number, and the second address information is second IP address information and a second port number. .

Optionally, the sending unit 302 is specifically configured to send the mapping relationship to the second routing device by using a control plane entity or control plane signaling.

The processing unit 301 is configured to execute the processes 101 and 104 in FIG. 2, the sending unit 302 is configured to execute the processes 102 and 105 in FIG. 2, and the receiving unit 303 is configured to execute the process 103 in FIG. The related descriptions and effects of the embodiments are understood, and the details are not described herein.

Referring to FIG. 7, another embodiment of the routing apparatus provided by the present invention includes:

The receiving module 401 is configured to receive a mapping relationship between the first address information and the second address information sent by the first routing device, where the first address information is that when the mobile node moves to the network where the first routing device is located The first routing device is address information allocated by the mobile node, and the second address information is address information acquired by the mobile node in the home network of the mobile node;

The processing module 402 is configured to modify, according to the mapping relationship, the second address information in the data packet sent to the mobile node that is received from the communication node to the first address information;

The sending module 403 is configured to send, to the first routing device, a data packet modified to the first address information, so that the first routing device sends the first packet in the received data packet according to the mapping relationship. After the address information is modified into the second address information, the data packet modified to the second address information is sent to the mobile node.

Optionally, the data packet is an Internet Protocol IP data packet, the first address information is first IP address information, and the second address information is second IP address information.

Optionally, the data packet is an Internet Protocol IP data packet, the first address information is first IP address information and a first port number, and the second address information is second IP address information and a second port number. .

Optionally, the foregoing processing module 402 is specifically configured to:

Establishing a mapping relationship between the first address information and the second address information;

Receiving, by the communication node, a data packet sent to the mobile node, and modifying the second address information in the data packet to the first address information according to the mapping relationship.

The receiving module 401 is used to execute the process 201 in FIG. 2, the processing module 402 is used to execute the process 202 in FIG. 2, and the sending module 403 is used to execute the process 203 in FIG. 2, and the related description may be corresponding to the method embodiment part. The relevant descriptions and effects are understood, and we will not repeat them here.

In one embodiment, as shown in FIG. 8, the routing device includes a receiver 501, a transmitter 502, a processor 503, and a memory 504. Memory 504 can include read only memory and random access memory and provides instructions and data to processor 503. A portion of the memory 504 can also include a non-volatile random access memory.

Memory 504 stores the following elements, executable modules or data structures, or subsets thereof, or their extended sets:

Operation instructions: include various operation instructions for implementing various operations.

Operating system: Includes a variety of system programs for implementing various basic services and handling hardware-based tasks.

The processor 502 executes the computer program stored in the memory 504 such that the routing device performs the method in the above embodiments.

The router according to an embodiment of the present invention may have more or less components than those shown in FIG. 8, may combine two or more components, or may have different component configurations or settings, and each component may include one Hardware, software, or a combination of hardware and software, including multiple signal processing and/or application specific integrated circuits.

In the embodiment of the present invention, the processor 503 is configured to execute the processes 101 and 104 in FIG. 2, as follows:

Allocating first address information to a mobile node that is moved to the network where the first routing device is located, and establishing a mapping relationship between the first address information and the second address information, where the second address information is the mobile node Address information obtained in the home network of the mobile node;

Modifying the first address information in the received data packet to the second address information according to the mapping relationship.

The transmitter 502 is configured to perform the processes 102, 105 of FIG. 2, as follows:

Transmitting, to the second routing device, the mapping relationship, where the mapping relationship is used by the second routing device to modify the second address information in the data packet sent to the mobile node received from the communication node to be Describe the first address information;

Transmitting, to the mobile node, a data packet that modifies the first address information to the second address information.

The receiver 501 is configured to execute the process 103 in FIG. 2, as follows:

Receiving, by the second routing device, a data packet modified to be the first address information.

Optionally, the data packet is an Internet Protocol IP data packet, the first address information is first IP address information, and the second address information is second IP address information.

Optionally, the data packet is an Internet Protocol IP data packet, the first address information is first IP address information and a first port number, and the second address information is second IP address information and a second port number. .

Optionally, the foregoing transmitter 502 is specifically configured to send the mapping relationship to the second routing device by using a control plane entity or control plane signaling.

The related descriptions can be understood by referring to the related descriptions and effects of the method embodiments, and will not be described in detail herein.

In another embodiment, as shown in FIG. 9, the router includes a receiver 601, a transmitter 602, a processor 603, and a memory 604. Memory 604 can include read only memory and random access memory and provides instructions and data to processor 603. A portion of the memory 604 may also include non-volatile randomness Access memory.

The memory 604 stores the following elements, executable modules or data structures, or a subset thereof, or an extended set thereof:

Operation instructions: include various operation instructions for implementing various operations.

Operating system: Includes a variety of system programs for implementing various basic services and handling hardware-based tasks.

The processor 602 executes the computer program stored in the memory 604 such that the routing device performs the method in the above embodiments.

The router according to an embodiment of the present invention may have more or less components than those shown in FIG. 9, may combine two or more components, or may have different component configurations or settings, and each component may include one Hardware, software, or a combination of hardware and software, including multiple signal processing and/or application specific integrated circuits.

In the embodiment of the present invention, the receiver 601 is configured to execute the process 201 in FIG. 2, as follows:

And receiving, by the first routing device, a mapping relationship between the first address information and the second address information, where the first address information is when the mobile node moves to the network where the first routing device is located, where the first routing device is Address information assigned by the mobile node, the second address information being address information acquired by the mobile node in the home network of the mobile node.

The processor 603 is configured to execute the process 202 in FIG. 2, as follows:

Modifying the second address information in the data packet sent to the mobile node received from the communication node according to the mapping relationship to the first address information.

The transmitter 602 is configured to perform the process 203 in FIG. 2, as follows:

Transmitting, to the first routing device, a data packet modified to the first address information, so that the first routing device modifies the first address information in the received data packet into a location according to the mapping relationship After the second address information is described, the data packet modified to the second address information is sent to the mobile node.

Optionally, the data packet is an Internet Protocol IP data packet, the first address information is first IP address information, and the second address information is second IP address information.

Optionally, the data packet is an Internet Protocol IP data packet, the first address information is first IP address information and a first port number, and the second address information is second IP address information and a second port. number.

Optionally, the processor 603 is specifically configured to:

Establishing a mapping relationship between the first address information and the second address information;

Receiving, by the communication node, a data packet sent to the mobile node, and modifying the second address information in the data packet to the first address information according to the mapping relationship.

The related descriptions can be understood by referring to the related descriptions and effects of the method embodiments, and will not be described in detail herein.

A person skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the system, the device and the unit described above can refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided by the present application, it should be understood that the disclosed system, apparatus, and method may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may contribute to the prior art or all or part of the technical solution may be embodied in the form of a software product stored in a storage. The medium includes instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that The technical solutions described in the embodiments are modified, or some of the technical features are replaced by equivalents; and the modifications or substitutions do not deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims (22)

A routing method, comprising: The first routing device allocates first address information to the mobile node that is moved to the network where the first routing device is located, and establishes a mapping relationship between the first address information and the second address information, where the second address information is Address information obtained by the mobile node in a home network of the mobile node; Transmitting, by the first routing device, the mapping relationship to a second routing device, where the mapping relationship is used by the second routing device to receive the data packet sent to the mobile node from a communication node Modifying the second address information into the first address information; Receiving, by the first routing device, a data packet that is sent by the second routing device and modified to the first address information; The first routing device modifies the first address information in the received data packet to the second address information according to the mapping relationship; The first routing device sends, to the mobile node, a data packet that modifies the first address information to the second address information. The method according to claim 1, wherein the data packet is an Internet Protocol IP data packet, the first address information is first IP address information, and the second address information is second IP address information. The method according to claim 1, wherein the data packet is an Internet Protocol IP data packet, the first address information is first IP address information and a first port number, and the second address information is Two IP address information and a second port number. The method according to any one of claims 1 to 3, wherein the first routing device is a routing device in a visited network of the mobile node, and the second routing device is a hometown of the mobile node A routing device in the network. The method according to any one of claims 1 to 3, wherein the first routing device is a routing device in a visited network of the mobile node, and the second routing device is a home network in which the communication node is located The routing device in the middle. The method according to any one of claims 1 to 3, wherein the first routing device is a routing device in a visited network of the mobile node, and the second routing device is a visited network where a communication node is located The routing device in the middle. The method according to any one of claims 1 to 3, wherein the sending, by the first routing device, the mapping relationship to the second routing device comprises: The first routing device sends the mapping relationship to the second routing device in the form of a control plane entity or control plane signaling. A routing method, comprising: The second routing device receives the mapping relationship between the first address information and the second address information sent by the first routing device, where the first address information is the first when the mobile node moves to the network where the first routing device is located The routing device allocates address information allocated by the mobile node, where the second address information is address information acquired by the mobile node in the home network of the mobile node; The second routing device modifies the second address information in the data packet sent to the mobile node received from the communication node to the first address information according to the mapping relationship; Transmitting, by the second routing device, the data packet modified to the first address information to the first routing device, so that the first routing device sends the first packet in the received data packet according to the mapping relationship After the address information is modified into the second address information, the data packet modified to the second address information is sent to the mobile node. The method according to claim 8, wherein the data packet is an Internet Protocol IP data packet, the first address information is first IP address information, and the second address information is second IP address information. The method according to claim 8, wherein the data packet is an Internet Protocol IP data packet, the first address information is first IP address information and a first port number, and the second address information is Two IP address information and a second port number. The method according to any one of claims 8 to 10, wherein the second routing means receives the number of data packets sent from the communication node to the mobile node according to the mapping relationship The modification of the second address information to the first address information specifically includes: The second routing device establishes a mapping relationship between the first address information and the second address information; The second routing device receives a data packet sent by the communication node to the mobile node, and modifies the second address information in the data packet to the first address information according to the mapping relationship. Method according to any of claims 8 to 10, characterized in that said first road The device is a routing device in the visited network of the mobile node, and the second routing device is a routing device in the home network of the mobile node. The method according to any one of claims 8 to 10, wherein the first routing device is a routing device in a visited network of the mobile node, and the second routing device is located at the communication node A routing device in a home network. The method according to any one of claims 8 to 10, wherein the first routing device is a routing device in a visited network of the mobile node, and the second routing device is a visited network where the communication node is located The routing device in the middle. A routing device, comprising: a processing unit, configured to allocate first address information to a mobile node that is moved to the network where the first routing device is located, and establish a mapping relationship between the first address information and the second address information, where the second address information Address information obtained by the mobile node in a home network of the mobile node; a sending unit, configured to send, to the second routing device, the mapping relationship, where the mapping relationship is used by the second routing device to receive the data packet sent to the mobile node from a communication node Modifying the second address information into the first address information; a receiving unit, configured to receive a data packet that is sent by the second routing device and modified to the first address information; The processing unit is further configured to modify the first address information in the received data packet to the second address information according to the mapping relationship; The sending unit is further configured to send, to the mobile node, a data packet that modifies the first address information to the second address information. The routing device according to claim 15, wherein the data packet is an Internet Protocol IP data packet, the first address information is first IP address information, and the second address information is second IP address information. . The routing device according to claim 15, wherein the data packet is an Internet Protocol IP data packet, the first address information is first IP address information and a first port number, and the second address information is The second IP address information and the second port number. The routing device according to any one of claims 15 to 17, wherein the sending unit is specifically configured to send the second routing device in the form of control plane entity or control plane signaling Send the mapping relationship. A routing device, comprising: a receiving module, configured to receive a mapping relationship between the first address information and the second address information sent by the first routing device, where the first address information is when the mobile node moves to the network where the first routing device is located Address information allocated by the routing device to the mobile node, where the second address information is address information acquired by the mobile node in the home network of the mobile node; a processing module, configured to modify, according to the mapping relationship, the second address information in a data packet sent from the communication node to the mobile node to the first address information; a sending module, configured to send, to the first routing device, a data packet modified to the first address information, so that the first routing device sends the first one of the received data packets according to the mapping relationship After the address information is modified into the second address information, the data packet modified to the second address information is sent to the mobile node. The routing device according to claim 19, wherein the data packet is an Internet Protocol IP data packet, the first address information is first IP address information, and the second address information is second IP address information. . The routing device according to claim 19, wherein the data packet is an Internet Protocol IP data packet, the first address information is first IP address information and a first port number, and the second address information is The second IP address information and the second port number. The routing device according to any one of claims 19 to 21, wherein the processing module is specifically configured to: Establishing a mapping relationship between the first address information and the second address information; Receiving, by the communication node, a data packet sent to the mobile node, and modifying the second address information in the data packet to the first address information according to the mapping relationship.

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