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Content source mobility support method based on active forwarding in CCN network

A content source and mobility technology, applied in the network field, can solve problems such as large routing update overhead, interest message loss, etc.

Active Publication Date: 2018-02-23
CHINA ACADEMY OF ELECTRONICS & INFORMATION TECH OF CETC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a content source mobility support method based on active forwarding in a CCN network, which solves the large routing update overhead introduced by the mobile switching of content sources in the existing CCN network, and content source mobility. Defects in which interest messages sent to content source locations are lost due to mobile switching

Method used

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  • Content source mobility support method based on active forwarding in CCN network
  • Content source mobility support method based on active forwarding in CCN network
  • Content source mobility support method based on active forwarding in CCN network

Examples

Experimental program
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no. 1 example

[0106] In the first embodiment of the present invention, a method for supporting content source mobility based on active forwarding in a CCN network, such as figure 1 shown, including the following specific steps:

[0107] Step S101, before the mobile switching of the content source, determine the new access point to which the content source moves and switches according to the preset mobile switching strategy, and send a first interest message to the original access router of the content source, so that the original access router is updated and The content source may provide forwarding information items corresponding to the content. Wherein, the message subtype of the first interest message is an active forwarding request.

[0108] Step S102, when the content source moves and switches, the original access router caches the second interest message sent to the original location of the content source in the interest storage according to the forwarding information entry. After r...

no. 2 example

[0134] In the second embodiment of the present invention, a data structure device for content source mobility support based on active forwarding includes the following components:

[0135] Content storage, pending interest table, forwarding information base and interest storage;

[0136] Wherein, the content storage is used to cache the data messages of the route nodes, and the content storage includes: the name of the third content, the data message and the first survival time. Any entry in the content store is a cache entry.

[0137] The pending interest table is used to record the status of interest messages received by the node but not yet consumed; according to the pending interest table, the data message containing the requested content is forwarded to the node requesting the content; the pending interest table includes: the fourth content name, Entry list and second life time. Any entry in the pending interest table is a pending interest entry.

[0138] The forwardin...

no. 3 example

[0142] The third embodiment of the present invention, this embodiment introduces a method for processing interest messages based on active forwarding content source mobility support, including the following specific steps:

[0143] Step S301, judging the message subtype of the interest message received by the node.

[0144] Wherein, the message subtypes of the interest message include: common forwarding, mobile forwarding, active forwarding request and mobile handover completion.

[0145] Step S302, performing at least one matching judgment on the interest message according to the judgment result of step S301 and the set matching principle.

[0146] Specifically, step S302 includes:

[0147] Step S3021: If the message subtype of the interest message is determined to be common forwarding, then match the first content name of the interest message with the cache entry corresponding to the third content name in the content storage;

[0148] If the cache entry corresponding to the ...

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Abstract

The invention provides a content source mobility support method based on active forwarding in a CCN network. The method comprises the steps of determining a new access point to which a content sourceis movably switched according to a preset movable switching strategy before the content source is movably switched, and sending an interested message to an original access router of the content source; after the content source receives the interested message, forwarding a data message including the requested content to a user of the content provided by the requested content source; and after the content source receives the interested message, forwarding the data message including the requested content to the user. According to the method provided by the invention, the defect that in the priorart communication breaks down due to the fact that the content source is movably switched is overcome, and continuity of communication in the CCN network is ensured; the user can acquire the content provided after the content source is movably switched within short time; routing update overheads caused by movable switching of the content source can be reduced, and relatively good route extension performance and relatively high message forwarding efficiency are provided.

Description

technical field [0001] The invention relates to the field of network technology, in particular to a method for supporting mobility of content sources based on active forwarding in a CCN network. Background technique [0002] CCN (Content Centric Networking) network has many advantages such as high resource utilization rate, low network energy consumption and good dynamic performance, and has now developed into one of the most recognized and potential network architectures in the field of Internet research in the future. However, as a new network architecture, the CCN network still has serious content source mobility problems, as follows: first, the mobile switching of the content source will lead to the loss of interest messages sent to the original location of the content source; second, The mobile switching of content sources will introduce a long mobile switching delay, which will reduce the user's mobile switching experience to a certain extent; third, the mobile switchi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/08H04L12/751H04L45/02
CPCH04L45/02H04L67/63H04L67/568
Inventor 饶迎刘秋妍张宇武超秘建宁
Owner CHINA ACADEMY OF ELECTRONICS & INFORMATION TECH OF CETC
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