Robust secure transmission method and system in time delay sensitive heterogeneous network

Abstract

The invention discloses a robust secure transmission method and system in a time delay sensitive heterogeneous network. The method comprises the steps that a non-central processing base station acquires information state information of a service user of the base station and service users of other base stations in the network and corresponding channel state error information; the central processingbase station establishes a joint design model, wherein the joint design model meets the reliability and security constraints of a time delay sensitive heterogeneous network, distinguishes the downlink information beam and the AN vector, and issues the downlink information beam and the AN vector to the corresponding non-central processing base station through the inter-base station link; and the non-central processing base station transmits downlink information to the service user of the non-central processing base station according to the received downlink information beam and AN vector. According to the invention, the receiving performance of legal users is improved, and the downlink communication reliability and security of the heterogeneous network are ensured; and the influence causedby the CSIs error is considered, so that the method has good robustness.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a robust and secure transmission method and system in time-delay-sensitive heterogeneous networks. Background technique [0002] 3GPP, ITU-R and other international standardization organizations pointed out that in order to realize the wireless access of massive mobile devices and the transmission requirements of large-capacity wireless traffic in the future, a direct and efficient method is to use the traditional macrocell base station (MacrocellBase Station, MBS) Low-power small cells are reasonably superimposed and deployed within the coverage area to form heterogeneous networks (Hetergeneous Networks, HeNets). However, compared with the traditional network, the heterogeneous network has a more open network architecture and contains more types and numbers of nodes, which provides convenience for eavesdroppers to eavesdrop and increases the risk of private inform...

AI Technical Summary

Problems solved by technology

Unfortunately, due to factors such as site overlapping coverage, dense deployment, and complex interlayer interference in heterogeneous networks, the probability of channel estimation, delay, and quantization errors greatly increases.

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