Joint optimization method of safety capacity and energy consumption in wireless relay network

Abstract

The invention discloses a joint optimization method of safety capacity and energy consumption in a wireless relay network, and relates to the field of wireless relay network cooperative communication. The method comprises the steps as follows: a safety capacity value from a source node to a destination node is restrained to be SCcon; a minimum energy consumption function of an interference node is obtained by using a beam forming technology according to the SCcon; a minimum energy consumption function of a relay node is obtained according to the SCcon; a minimum energy consumption function Dpower of a system is obtained; a minimum energy consumption value of the system is obtained at an extreme point of a minimum value of the Dpower, and the restrained safety capacity is released; and an efficiency function RSE of the system energy consumption is calculated. The invention provides a joint optimization strategy of the relay node and the interference node, and an accurate expression of equivalent safety capacity maximization corresponding to the unit energy consumption of the system is obtained, so that each part of energy reaches the maximal usage value, and the problem of balance between the safety and the energy efficiency in the wireless relay network under a single sniffing node is effectively solved.

Description

technical field [0001] The invention relates to the cooperative communication field of a wireless relay network, in particular to a joint optimization method of security capacity and energy consumption in a wireless relay network. Background technique [0002] In the current wireless relay network, the energy of relay nodes is often limited, so it is necessary and meaningful to ensure that every energy consumed can be used to the fullest when the data flow is unpredictable things. [0003] At present, the broadcasting characteristics of wireless relay networks make the secure transmission more and more widely concerned. The knowledge of traditional physical layer security theory tells us that under the condition of eavesdropping channels, if we want to transmit information safely, we must ensure that the channel state between the source node and the destination node is better than the channel between the source node and the eavesdropping node. state. The existing methods ...

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Problems solved by technology

[0004] The current research on the security and energy saving of wireless relay networks, because the transmission of signals in the link between the source node and the destination node needs to rely on energy, although it also involves the security capacity of the link between the source node and the destination node and the energy consumption in the system , but it is often only to derive the maximum value of the link security capacity between the source node and the destination node under the condition of constraining the transmit power of the node, or to derive the minimum power of the configured node under the condition of constraining the security capacity to a certain value, rarely A Case Study of Simultaneous Study of Safety Capacity and System Energy Consumption Under Unconstrained Conditions

Moreover, most of the existing theoretical research on security capacity proposes cooperation schemes under a single node (relay node or interference node), which cannot fully maximize the role of intermediate nodes.

In addition, the existing relay selection schemes that consider both safety capacity and energy consumption only analyze the impact of different factor weight ratios on the final performance, but do not give an exact solution for the balance of the two

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