Physical layer security in mmWave cellular networks
Recent research has shown that millimetre wave (mmWave) communications can offer orders of magnitude increases in the cellular capacity. However, the physical layer secrecy performance of a mmWave cellular network has not been investigated so far. Leveraging the new path-loss and blockage models for mmWave channels, which are significantly different from conventional microwave channels, this chapter studies the network-wide physical layer security performance of the downlink transmission in a mmWave cellular network under a stochastic geometry framework. We first study the secure connectivity probability and the average number of perfect communication links per unit area in a mmWave network in the presence of non-colluding eavesdroppers. Then, the case of colluding eavesdroppers is studied. Numerical results demonstrate the network-wide secrecy performance, and provide interesting insights into how the secrecy performance is influenced by network parameters.
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