Method for improving security of physical layer of collaborative network by using energy collection

A physical layer security and energy harvesting technology, applied in the direction of advanced technology, reducing energy consumption, electrical components, etc., to achieve the effect of improving energy utilization efficiency, saving power, and improving physical layer security

Inactive Publication Date: 2018-01-19
TIANJIN UNIV
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  • Summary
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a method for improving the security of the physical layer of the cooperative network by using energy collection. The present invention combines compressed sensing and energy collection technology and applies it to the wireless cooperative network to improve the security performance of the network and solve the problem of providing relay nodes with The problem of energy is to convert the radio frequency signal sent by the source node into the energy of the relay to ensure the efficient use of energy and the effective and safe transmission of data. See the description below for details:

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  • Method for improving security of physical layer of collaborative network by using energy collection
  • Method for improving security of physical layer of collaborative network by using energy collection
  • Method for improving security of physical layer of collaborative network by using energy collection

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Embodiment 1

[0032] An approach to using energy harvesting to improve the physical layer security of collaborative networks, see figure 1 , the method includes the following steps:

[0033] 101: Combining energy harvesting and compressed sensing, each relay node is equipped with an energy harvesting receiver for converting radio frequency signals into energy and amplifying and forwarding signals;

[0034] 102: Since information reception and energy conversion can be performed at the same time, the power distribution relay criterion is adopted, and the relay node divides the received signal into two parts according to the power distribution ratio, which are used for energy collection and information transmission respectively;

[0035] 103: Using the energy converted in step 101 to amplify and forward the received information;

[0036] 104: Analyze the impact of different parameters on system security in Gaussian channels, and obtain different optimal power allocation ratios in different ch...

Embodiment 2

[0039] Combine below figure 1 , figure 2 And concrete calculation formula, example are further introduced to the scheme in embodiment 1, see the following description for details:

[0040] Among them, the working mechanism of the energy harvesting network provided by the embodiment of the present invention is:

[0041] 1) In the first time slot, all source nodes S send information to the relay node R at the same time, and the relay node R divides the received signal into two parts according to the power allocation ratio, and the first part is used for energy collection (converted into energy) , the second part as information;

[0042] 2) In the second time slot, the relay node R uses the collected energy (the first part) to amplify the received information (the second part), and forwards it to the destination node D.

[0043] 201: Construct a compressed sensing collaborative network model based on energy harvesting;

[0044] Among them, see figure 1 , assuming that there...

Embodiment 3

[0076] Combined with the specific experimental data, Figure 4 The scheme in embodiment 1 and 2 is carried out feasibility verification, see the following description for details:

[0077] There are 15 source nodes S, 4 relay nodes R, 2 eavesdropping nodes E, and 1 destination node D in the network. The distance between the source node and the relay node is normalized, that is, d SD = d SR +d RD = 1, the energy harvesting mechanism only needs to provide power P for the source node S S , the non-energy harvesting mechanism needs to provide the power P of the source node S S and relay power P R , then the sum of the power provided by the non-energy harvesting mechanism is P=P S +P R =10 -2 W.

[0078] Figure 4 It shows that the distance between the relay node R and the source node S is d SR =0.3, the total power P of non-energy harvesting is fixed (P=10 -2 W), the power P of the source node S of the two mechanisms S At the same time, the safe capacity varies with th...

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Abstract

The invention discloses a method for improving the security of a physical layer of a collaborative network by using energy collection. The method comprises the following steps: combining energy collection with compressed sensing, wherein each relay node is provided with an energy collection receiver for converting a radio frequency signal into energy and amplifying a forwarding signal; performinginformation reception and energy conversion at the same time, adopting a power allocation relay criterion, dividing the received signal into two parts according to a power allocation ratio by the relay node for energy collection and information transmission; applying the converted energy to amplifying and forwarding the received information; analyzing the influence of different parameters to the security of the system in a Gaussian chassis, obtaining different optimal power allocation ratios in different channel environments so as to guarantee the security performance of the collaborative network. According to the method, the compressed sensing is combined with the energy collection technology for solving the problem that the energy is difficult to be provided for the relay node, and the radio frequency signal sent by the source node is converted into the energy of the relay, thereby ensuring the efficient use of the energy and the effective and secure transmission of the data.

Description

technical field [0001] The invention relates to the field of wireless sensor networks, in particular to a cooperative security transmission method in which relays do not need external power supply. Background technique [0002] In wireless sensor networks, there are a large number of sensor nodes, which are battery-limited devices, and their power supply is powered by dry batteries. Once the power is exhausted, the batteries need to be replaced. However, it is difficult to replace or recharge the batteries in many environments, so it is guaranteed The power of the device itself becomes a problem. [0003] At present, it has become a research direction by converting the energy in the environment into the energy of the node itself. However, energies such as solar energy and wind energy are easily restricted by factors such as weather and environment, and cannot ensure continuous and reliable power supply for sensor nodes. Therefore, radio frequency energy harvesting has becom...

Claims

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Application Information

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IPC IPC(8): H04W40/10H04W40/22H04W72/04
CPCY02D30/70
Inventor 付晓梅李佳伦常帅张亮
Owner TIANJIN UNIV
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