A D2D cache user security cooperation method and system based on joint content delivery and interference blocking

A technology that interferes with blocking and users, and is applied in security devices, machine-to-machine/machine-type communication services, advanced technologies, etc., achieving low implementation complexity, guaranteed confidentiality, and low overhead

CN112822662BActive Publication Date: 2022-05-20XI AN JIAOTONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2022-05-20

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Abstract

A D2D cache user security cooperation method and system based on joint content transmission and interference blocking provided by the present invention includes the following steps: Step 1, constructing a cooperation area where a requesting user is located in the current time slot; Step 2, combining the steps The cooperation area constructed in step 1 is divided into cooperative transmission area and cooperative blocking area to construct a cooperation scheme; step 3, according to the cooperation scheme constructed in step 2, respectively calculate the connection interruption probability and confidentiality interruption probability between the requesting user and the cooperation user ; Step 4, according to the connection interruption probability obtained in step 3 and the confidentiality interruption probability calculation to obtain the optimal solution of confidentiality throughput; the present invention effectively improves the throughput performance of the system while ensuring the confidentiality of information transmission.
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Description

technical field

[0001] The present invention relates to the security transmission problem of the wireless communication physical layer, in particular to a D2D cache user security cooperation method and system based on joint content delivery and interference blocking. Background technique

[0002] Wireless communication has brought great convenience to people's life, and has been widely used in every aspect of people's life. Global mobile data traffic is showing an exponential growth trend, which poses an unprecedented challenge to the backhaul link of the cellular network. Backhaul link capacity and network delay have become key performance bottlenecks in the cellular network. In this context, wireless caching technology emerges as the times require and becomes an effective way to alleviate the burden on the backhaul network. Through wireless caching technology, some of the more popular content can be stored in the edge nodes of the wireless network (such as base stations a...

Examples

Embodiment Construction

[0046] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0047] Aiming at the secure transmission problem of D2D network, the present invention proposes a D2D cache user security cooperation method based on joint content transmission and interference blocking, based on the following system model:

[0048]In the collaboration area, there are multiple D2D users, and each user has caching capability and can cache one file. When a user requests a file, other users who have cached the file cooperate to complete the file delivery, and there are randomly distributed eavesdroppers in the network trying to intercept the file information.

[0049] All D2D users and eavesdroppers are equipped with a single antenna.

[0050] A D2D cache user security cooperation method based on joint content transmission and interference blocking provided by the present invention includes the following steps:

[0051] In the first step, the ...