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

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...

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:

Images