RIS-based anti-multi-eavesdropper information security transmission method in heterogeneous energy-carrying network

The invention provides an anti-multi-eavesdropper information security transmission method based on an RIS in a heterogeneous energy-carrying network, and the method is characterized in that the method comprises the steps: each base station obtains the channel state information of a user and a reflection cascade link CSI passing through the RIS; the micro base station sends the acquired local user and the reflection cascade link CSI passing through the RIS to the macro base station through an X2 interface; determining downlink transmission beam forming, artificial noise vectors and phase shift coefficients of RISs of the macro base station and the micro base station; the macro base station sends the optimal downlink sending beam forming, the artificial noise vector and the RIS phase shift coefficient of the micro base station to the micro base station through an X2 interface; the macro base station and the micro base station respectively issue the phase shift coefficient to the RISs through a wireless control