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Data transmission method and system

A data transmission and data packet technology, applied in the Internet field, can solve the problems that the ASN cannot find the location identifier of the first data packet locally, and the first data packet cannot be forwarded, etc., and achieves easy expansion of the encapsulation format, easy version upgrade, and data forwarding performance. high effect

Inactive Publication Date: 2011-04-20
ZTE CORP
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a data transmission method and system, which solves the problem that the ASN cannot locally query the location identifier of the destination terminal of the first data packet, resulting in that the first data packet cannot be forwarded, and realizes the first data transmission of user data. packet forwarding

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  • Data transmission method and system
  • Data transmission method and system

Examples

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Embodiment Construction

[0039] figure 1 Shown is a network architecture that realizes the separation of identity identifiers and location identifiers. This architecture divides the network into an access network and a backbone network. The access network is located at the edge of the backbone network and is responsible for the access of all terminals. The backbone network is responsible for the routing and forwarding of data packets between terminals accessed through the access network. There is no overlap between the access network and the backbone network in topology.

[0040]There are two types of identifiers in the network of this architecture: Access Identifier (AID: Access Identifier) ​​and Routing Identifier (RID: Routing Identifier). Among them, AID is the user identity identification of the terminal, which is used to identify the identity of the terminal user (also referred to as the user for short). The network uniquely assigns an AID to each terminal user. Change; RID is a location iden...

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Abstract

The invention discloses a data transmission method applied to a network of which an identity identifier is separated from a location identifier. The data transmission method comprises the following steps that: a source terminal sends a first packet to a source access support node (ASN) and takes an access identifier (AID) of the source terminal and an AID of a destination terminal as a source address and a destination address of the first packet respectively; after the first packet is received, if a routing identifier (RID) which corresponds to the AID of the destination terminal is not locally queried, the source ASN takes the first packet as a payload packet by adopting a generic routing encapsulation (GRE) form and encapsulates the payload packet added with a GRE packet header and a transmission protocol packet header as a second packet; and the source ASN sends the second packet to a mapping forwarding plane, which queries the RID corresponding to the AID of the destination terminal and sends the first packet to a destination ASN according to the queried RID.

Description

technical field [0001] The invention relates to the technical field of the Internet, in particular to a data transmission method and system. Background technique [0002] At present, the IP address in the TCP / IP (Transmission Control Protocol / Internet Internet Protocol) protocol widely used on the Internet has dual functions. The identity of the interface. At the beginning of the TCP / IP protocol design, the movement of the host was not considered. However, when the host mobile becomes more and more common, the semantic overload defect of this IP address becomes more and more obvious. When the IP address of the host changes, not only the route will change, but also the identity of the communication terminal host will change, which will lead to an increasingly heavy routing load, and the change of the host identity will lead to interruption of applications and connections. [0003] The purpose of proposing the separation of identity identification and location identificatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L29/06
CPCH04L61/10H04L45/04H04L12/28
Inventor 何辉
Owner ZTE CORP
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