Details

Autor(en) / Beteiligte

• Wan, Zheng
• Huang, Kaizhi
• Xu, Xiaoming
• Yi, Ming
• Wang, Hui-Ming
• Zhu, Zhengyu
• Jin, Liang

Titel

RIS-Assisted Integration of Communications and Security: Protocol, Prototyping, and Field Trials

Ist Teil von

• IEEE internet of things journal, 2024-08, Vol.11 (16), p.26877-26887

Ort / Verlag

Piscataway: IEEE

Erscheinungsjahr

2024

Quelle

IEEE Electronic Library (IEL)

Beschreibungen/Notizen

• Reconfigurable intelligent surface (RIS), which can manipulate the wireless environment, has recently been integrated into physical-layer key generation (PKG) systems to establish randomness symmetric keys in static environments. However, few studies have jointly considered the optimization and randomization of the RIS elements to simultaneously achieve a high key generation rate (KGR) and communication performance. This study proposes an RIS-assisted communication and security-integrated protocol for dual-function integration of communication enhancement and PKG in static environments. The protocol partitions RIS elements for beamforming and random beams for parallel execution, utilizing a sparsity adaptive matching pursuit-based channel estimation algorithm to obtain individual channel state information. Subsequently, an optimization problem is formulated for KGR maximization while satisfying Quality-of-Service (QoS) requirements. The nonconvex optimization problem is addressed through monotonicity analysis and triangle inequality. We validate the efficacy of the proposed protocol by developing a 4.9-GHz RIS-assisted PKG prototype system, comprising modular hardware and flexible software. The field trials demonstrate a 30.81-bit/s KGR for static environments with an average received power increase of 10.6 dB, achieving effective simultaneous integration of communication and security.