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An Optimal Power Allocation Method in Untrusted Relay Networks

A relay network and allocation method technology, applied in the field of optimal power allocation schemes, can solve problems such as not considering energy efficiency, and achieve the effect of simplifying the calculation process

Active Publication Date: 2019-01-18
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, Document 3 only considers maximizing the safe capacity and does not consider energy efficiency

Method used

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  • An Optimal Power Allocation Method in Untrusted Relay Networks
  • An Optimal Power Allocation Method in Untrusted Relay Networks
  • An Optimal Power Allocation Method in Untrusted Relay Networks

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Embodiment Construction

[0041] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, and the present invention includes but not limited to the following embodiments.

[0042] The channel model used in the present invention is a two-hop half-duplex relay network with three nodes, and its communication principle block diagram is as follows figure 1 shown. The model includes a source node S and a destination node D, and S and D can only communicate through an untrusted relay node R. The communication between source node S and destination node D needs to be completed in two time slots. In the first time slot, S sends a message signal x to R S , at the same time D sends an interference signal x to R D . In the second time slot, R amplifies the signal received in the first time slot and forwards it to D, where the amplification factor is β. define h SR and h DR are the channel gains from S to R and D to R, respectively, h RS and h RD a...

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Abstract

The invention provides an optimal power distribution method in an untrusted relay network. A communication process of a two-hop half-duplex relay network is modelled at first; then, the system security capacity and the energy efficiency are comprehensively considered; on the premise that the total power is ensured to be constant, an optical power distribution factor is solved; therefore, the security energy efficiency of a system is maximum; and the security energy efficiency of the power limited two-hop half-duplex network is increased. According to the optical power distribution method disclosed by the invention, the energy efficiency is considered; the security energy efficiency can be maximized under a total power limiting condition; furthermore, user information is prevented from being cracked by an untrusted relay node as much as possible; a calculation process is simplified through a taylor expansion; and furthermore, the estimation error due to use of the first item in the expansion is not beyond 1%, and can be ignored.

Description

technical field [0001] The invention relates to an optimal power allocation scheme of a cooperative interference relay network, which is used for maximizing security energy efficiency under the condition of limited total power, and protecting user information from interference of untrusted relay nodes as much as possible. Background technique [0002] With the development of information and communication technology, green communication has become a new development trend of future wireless communication. While the cooperative communication technology improves the energy efficiency of the wireless communication system, it also brings security risks such as malicious eavesdropping and illegal forwarding. Therefore, how to maximize the safe energy efficiency of the system under the condition of total power limitation has become an important issue in the research of cooperative communication. [0003] In the physical layer, there is a game problem of power allocation between the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W52/24H04W52/26H04W52/32H04W52/34H04W52/46
CPCH04W52/241H04W52/267H04W52/325H04W52/346H04W52/46
Inventor 姚如贵徐菲徐娟王伶张兆林
Owner NORTHWESTERN POLYTECHNICAL UNIV
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