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

A technology that interferes with blocking, users, and is used in security devices, machine-to-machine/machine-type communication services, advanced technologies, etc.

CN112822662AActive Publication Date: 2021-05-18XI AN JIAOTONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2021-05-18

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Abstract

The invention provides a D2D cache user security cooperation method and system based on joint content transmission and interference blocking. The method comprises the following steps: step 1, constructing a cooperation area of an area where a user with a certain request is located in a current time slot; step 2, dividing the cooperation area constructed in the step 1 into a cooperation transmission area and a cooperation blocking area to construct a cooperation scheme; step 3, respectively calculating a connection interruption probability and a secrecy interruption probability between the request user and a cooperation user according to the cooperation scheme constructed in the step 2; and step 4, according to the connection outage probability and the secrecy outage probability obtained in the step 3, acquiring the optimal solution of secrecy throughput through calculation. According to the invention, the throughput performance of the system is effectively improved while information transmission confidentiality is ensured.
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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 transmission 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 statio...

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 ...