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Downlink Control Information Sniffing-Based Smart Jamming and Its Suppression Strategy in 5G NR
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Summary
This paper examines a smart jamming attack on the physical uplink shared channel (PUSCH) in 5G NR. The adversary sniffs the downlink control information (DCI) to learn the scheduled resources, then jams the PUSCH transmission precisely and covertly. The authors propose a suppression method that identifies the DCI-scheduled subset and reconstructs PUSCH resources, relying on spatial-domain differences between legitimate users and the attacker. Numerical results are reported to confirm its effectiveness.
Mitigation
The source describes a suppression method that uses DCI-scheduled subset identification and PUSCH resource reconstruction, selectively excluding unwanted control channel elements and resource block groups while preserving the targeted transmissions. It is presented as the authors' proposed countermeasure against DCIS-SJ.