D2D Heterogeneous Cellular Security Transmission Method Based on Statistical QoS Guarantee

Abstract

The invention discloses a D2D heterogeneous cellular security transmission method based on statistical QoS guarantee, comprising the steps of: establishing a non-convex optimization problem, the optimization problem aims at maximizing the sum of the effective capacity of the cellular link and the D2D link and Subject to the following constraints: a), delay-sensitive security of D2D user transmitters; b) average and peak transmit power constraints of cellular user transmitters; c) average and peak transmit power constraints of D2D user transmitters; step 2 , Solving the non-convex optimization problem, looking for the transmit power P of the cellular user transmitter that maximizes the sum of the effective capacity of the cellular link and the D2D link c (h,θ) and the transmit power P of the D2D user transmitter d (h, θ); the transmit power P of the cellular user transmitter c (h,θ) and the transmit power P of the D2D user transmitter d (h,θ) is the optimal solution of a non-convex optimization problem as a power allocation scheme for D2D heterogeneous cellular networks. Compared with the fixed power scheme and the constant power transmission scheme of cellular users, the sum and effective capacity of the entire heterogeneous network applying this scheme is larger.

Description

technical field [0001] The invention belongs to the technical field of physical layer security transmission in 5G networks, and in particular relates to a D2D heterogeneous cellular security transmission method based on statistical QoS guarantee. Background technique [0002] In order to achieve very attractive system performance of the next generation wireless communication network (5G wireless communication network), the communication technology about 5G has received extensive attention from industry and academia in recent years. The evolution of key technologies of 5G is manifested by improving different system performance indicators, such as spectral efficiency, QoS (Quality of Service) and secure transmission of information, etc. Spectrum efficiency in 5G networks can be improved in frequency / time / space domains. Because D2D (Device-to-Device) communication reuses the spectrum resources of cellular users and allows two devices with close physical distances to communicat...

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Problems solved by technology

However, in practical wireless communication systems, for example, in 5G wireless communication networks, this metric cannot accurately reflect the delay-sensitive security requirements for the following reasons: First, a highly randomly changing wireless environment cannot always guarantee a positive Secrecy capacity, so that legitimate users will lose some transmission opportunities, resulting in a decrease in the transmission rate

Secondly, cellular users and D2D users may have different service requirements, or these users may have different service requirements at different times, which will result in different delay-sensitive security requirements

However, it is difficult to describe different delay-sensitive security requirements using only secrecy capacity

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