Address mapping system and data transmission method of identifier/locator separation network

Abstract

The invention relates to an address mapping system of an identifier/locator separation network, which comprises a domain mapping plane and a domain mapping server, wherein the domain mapping plane stores a local domain route list and a local mapping list and is used for receiving messages transmitted from access service nodes or other domain mapping planes, and identifiers are carried in the messages; the domain mapping server stores an identifier/mapping plane correlation list and is used for receiving domain inquiry requests of the domain mapping plane, and the inquiry requests contain target identifiers. The method comprises the following steps: according to the local domain route list, judging whether to transmit the domain inquiry request to the domain mapping server when the target identifier does not belong to the domain mapping plane; receiving the target domain mapping plane information returned by the domain mapping server, and transmitting a message to the target domain mapping plane; according to the local mapping list, transmitting a message to the target access service node corresponding to the target route identifier; and according to the domain inquiry request, inquiring the identifier/mapping plane correlation list to acquire the target domain mapping plane information and return the information to the domain mapping plane.

Description

technical field [0001] The invention relates to an identity and location separation technology, in particular to a name-address mapping system and a data transmission method for an identity and location separation network. Background technique [0002] In order to solve the problem of the rapid expansion of the Internet core router routing table capacity and the ambiguity of IP addresses, the IETF (Internet Engineering Task Force, Internet Engineering Task Force) has proposed the technology of separating identity and location in recent years, using LISP (Identity and Location Separation Protocol, The LISP protocol proposed by the Locator and IdentifierSeparation Protocol) working group is taken as an example. The terminal identity (EID, Endpoint IDentifier) ​​does not participate in the routing of the IP core network, and the backbone router can only see the interface routing address (RLOC, Routing LOCator), and a border router can access a large number of terminals, and sep...

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Problems solved by technology

[0003] LISP can greatly reduce the routing table capacity of IP backbone network routers, but it leaves the complexity in the mapping plane, which needs to store all EID-RLOC correspondences. In IETF's LISP+ALT (ALT is the abbreviation of Alternative Topology , representing an optional topology scheme) In the scheme, it is assumed that the terminal is immovable, and each terminal belongs to a certain access router, so the ordinary IP hop-by-hop routing method can be used on the mapping plane to finally route to the destination access router. However, this assumption is not valid in the mobile network, so it is not suitable for solving the problem of separating the identity and location of the mobile terminal access network

Luo Hongbin (transliteration) of Beijing Jiaotong University published the "ADHT-based Identifier-to-locator Mapping Approach for

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