Eavesdropping preventing method and device

Abstract

The embodiment of the invention discloses an eavesdropping preventing method and device. The eavesdropping preventing method and device are applied to an SBS in a heterogeneous cellular network. The method includes the steps that a first channel gain between the device and each piece of MUE and a second channel gain between the device and an interceptor on a subchannel of each piece of MUE are acquired; according to the first channel gains, the second channel gains and a revenue function, gain values of allies where the device and each piece of MUE are located are calculated; according to the gain values, the ally relationship between the device and each piece of MUE is established; according to the ally relationships, signals for preventing data sent by an MBS to the MUE from being eavesdropped by the interceptor are sent on the subchannels of the MUE with the ally relationships with the device, wherein the signals are part of effective information sent by the SBS to SUE. By means of the method and device, the data sent by the MBS to the MUE is prevented from being eavesdropped by the interceptor, and the performance losses of the SBS are reduced.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a method and device for preventing wiretapping. Background technique [0002] It is predicted that the global mobile communication traffic will increase by 500-1000 times in the next ten years. In order to meet the ever-increasing demands of users and significantly improve the performance of cellular networks, HCN (Heterogeneous Cellular network, heterogeneous cellular network) came into being. High spectrum efficiency improves the utilization efficiency of spectrum resources and coverage in indoor and hotspot areas, making it one of the most promising key technologies for 5G. [0003] In recent years, with people's dependence on information and the development of information technology, information security has become an important aspect of communication technology research. In HCN, there are very few researches on network security and privacy. In the absence of special s...

AI Technical Summary

Problems solved by technology

There are many SBSs (Small cell Base Stations) distributed in HCN, and SBSs can be used as jammers to provide friendly interference services for MUEs. However, in the prior art, SBSs use Gaussian noise as interference signals to provide friendly interference services for MUEs, sending This part of the energy of the noise cannot be used for SUE (Smallcell User Equipment, small cell user) business transmission, resulting in the performance loss of the SBS during the period of providing friendly interference services

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