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Caching method and device for content centric networking (CCN)
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A content-centric network and cache technology, applied in the computer field, can solve the problems of poor cache diversity, high communication overhead of network nodes, and high cache redundancy, and achieve the effects of reducing overhead, increasing diversity, and reducing redundancy.
Active Publication Date: 2017-07-25
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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[0006] The object of the present invention is to provide a caching method and device for a content-centric network, aiming to solve the problem of high cache redundancy in the independent node caching method and cache diversity in the on-path caching method in the prior art of the content-centric network Poor and the problem of large communication overhead between network nodes in the neighbor cooperative caching method
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[0024] figure 1 The implementation process of the content-centric network caching method provided by the first embodiment of the present invention is shown. For the convenience of description, only the parts related to the embodiment of the present invention are shown, and the details are as follows:
[0025] In step S101, the node centrality of each node in the content-centric network is generated according to a preset calculation formula of node centrality.
[0026] In the embodiment of the present invention, the node centrality reflects the importance of the node in the content-centric network, and the calculation formula of the node centrality is:
[0027] τ(i)=ατ D (i)+βτ C (i)+γτ B (i), where τ(i) is the node centrality of node i in the content-centric network, τ D (i) is the degree centrality of node i, τ C (i) is the close centrality of node i, τ B (i) is the node betweenness of node i, α, β and γ are preset weights, and α+β+γ=1.
[0028] Therefore, in the speci...
Embodiment 2
[0044] figure 2 The structure of the caching device of the content-centric network provided by the fourth embodiment of the present invention is shown. For the convenience of description, only the parts related to the embodiment of the present invention are shown, including:
[0045] The node centrality calculation module 21 is configured to generate the node centrality of each node in the content-centric network according to a preset node centrality calculation formula.
[0046] In the embodiment of the present invention, the node centrality reflects the importance of the node in the content-centric network, and the calculation formula of the node centrality is:
[0047] τ(i)=ατ D (i)+βτ C (i)+γτ B (i), where τ(i) is the node centrality of node i in the content-centric network, τ D (i) is the degree centrality of node i, τ C (i) is the close centrality of node i, τ B (i) is the node betweenness of node i, α, β and γ are preset weights, and α+β+γ=1.
[0048] Therefore,...
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Abstract
The invention is applicable to the technical field of computers, and provides a caching method and device for content centric networking (CCN). The method comprises the following steps: according to a preset node centricity calculation formula, generating the node centricity of each node in the CCN; according to the centricities of all the nodes, selecting a part of the nodes; calculating the number of collaborative neighbor nodes corresponding to each node in the part of the nodes, and acquiring the collaborative neighbor nodes corresponding to each node in the part of the nodes according to the number of the collaborative neighbor nodes; and when one of the collaborative neighbor nodes receives data to be cached, determining a caching node corresponding to the data among the collaborative neighbor nodes, and caching the data in the caching node. The method and device provided by the invention has the advantages that the redundancy of cached contents in the CCN is effectively reduced, the variety of the cached contents is improved, and expenses for collaborative communication among the nodes in the CCN are effectively reduced.
Description
technical field [0001] The invention belongs to the technical field of computers, and in particular relates to a caching method and device for a content-centric network. Background technique [0002] With the continuous development and changes of Internet applications, Internet system reception based on IP (Internet Protocol) faces major challenges in content distribution, mobility, scalability, and security. The future Internet architecture will change from a host-centric The communication model evolves to a content-centric network model. [0003] The content-centric network is a revolutionary future Internet design idea. It no longer names the address of the data, but directly names the data itself. The named data becomes the most critical network entity, so the content-centric network no longer pays attention to the terminal The security of the device directly focuses on the security of the named content, so that the data transmission mechanism can fundamentally realize ...
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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/08
CPCH04L67/568
Inventor 李成明陈会张巍姜青山
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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